The right tool earns its place by removing a real bottleneck: finding a buyer, checking a price, writing a clear listing, buying the right label, or keeping usable records. A beginner does not need a 15-app subscription stack before the first sale.
Start with a small workflow you can explain and repeat. Add a paid tool only after you can name the task it improves, the time or errors it actually reduces for you, and the cost you are willing to carry every month.
This guide keeps the original 15-tool map, but pricing and marketplace rules change. Use each section to decide whether the tool fits your next job, then check its official pricing and policy page before subscribing. The 12 best reseller apps offers a more focused comparison.
If you searched for apps to resell on, start with the selling platform first, then add research, shipping, listing, and bookkeeping tools around it. A beginner does not need every app on day one; they need one place to list inventory, one way to check sold prices, one shipping workflow, and one simple money tracker.
| App or platform | Best beginner use | Why start there | Add next |
|---|---|---|---|
| eBay | General merchandise, electronics, collectibles, books, parts, and unusual finds | Largest search-driven buyer pool and built-in sold-comps research | Profit calculator, shipping labels, title optimizer |
| Mercari | Casual listings, home goods, toys, small electronics, and simple mobile selling | Fast listing flow and straightforward buyer messaging | Fee comparison and relist workflow |
| Poshmark | Clothing, shoes, bags, and fashion accessories | Fashion buyers already browse by brand, size, and closet style | Photo cleanup and crosslisting |
| Facebook Marketplace | Furniture, luggage, bulky items, local bundles, and fast cash sales | Local pickup avoids shipping, packing, and some platform friction | Negotiation floor and safety checklist |
Whether you’re flipping thrift store finds on eBay, selling vintage clothing on Poshmark, or moving electronics on Facebook Marketplace, these are the tools that give you a competitive edge from day one.
New to reselling? Start with our ultimate beginner’s guide first, then come back to set up your tool stack.
Selling Platforms: Where You List Your Items
These are the apps where you actually sell. Begin with one marketplace that fits the item; add another only when the extra buyer reach is worth the duplicate inventory and order-management work.
1. eBay
What it does: eBay supports many resale categories and both auction and fixed-price listings. It is especially useful when buyers search by model, part number, brand, size, or collectible detail.
Cost: Account, insertion, final-value, per-order, optional promotion, and Store fees depend on category and account status. eBay currently includes up to 250 zero-insertion-fee listings for many sellers, but verify the exclusions and current amounts on eBay’s official selling-fee page.
Beginner Rating: ⭐⭐⭐⭐⭐
| Pros | Cons |
|---|---|
| Broad, search-driven buyer reach | Fees vary by category, order, options, and seller status |
| Sells virtually every category | Listing process has a learning curve |
| Documented seller-protection process | Returns and protections depend on policy and facts |
| Integrated label options | Funds may be held under current account policies |
| Global reach with international shipping |
Pro tips for beginners:
- Enable Seller Hub immediately (sellerhub.ebay.com) for analytics and traffic data
- Choose fixed price when you need a floor and auction only when comparable demand supports real bidder competition
- Choose free or buyer-paid shipping from the full delivered price, category norms, return risk, and margin; do not assume one setting guarantees ranking
- Use eBay’s shipped-with-label option for discounted USPS, UPS, and FedEx rates
When calculating whether eBay is the right platform, use our Platform Fee Calculator to see exactly what you’ll net after all fees. For a complete walkthrough, see our eBay selling guide for beginners.
2. Mercari
What it does: Mercari offers a mobile-first listing flow for clothing, home goods, electronics, toys, and general merchandise.
Cost: Mercari’s current US help page states that listing is free and a 10% seller fee applies to the item price plus buyer-paid shipping for new or updated listings. Buyer-facing charges and other services can also affect conversion, so verify Mercari’s official fee page before pricing.
Beginner Rating: ⭐⭐⭐⭐⭐
| Pros | Cons |
|---|---|
| Streamlined mobile listing flow | Demand varies sharply by category |
| Built-in shipping with prepaid labels | Some categories sell slower |
| “Smart Pricing” automatically lowers price to attract buyers | Buyers can rate you as low as 1 star |
| Local meetup option for no-shipping sales | Limited analytics compared to eBay |
Pro tips for beginners:
- Compare Mercari’s current promotion options with your margin before paying for visibility
- Set an offer floor from your costs and realistic net proceeds instead of assuming a standard buyer discount
- Compare the prepaid label with eligible current carrier services using the final packed weight, dimensions, coverage, and protection terms
- Relist items that haven’t sold in 30 days-fresh listings get a search boost
3. Poshmark
What it does: The go-to platform for clothing, shoes, and accessories. Poshmark’s social-commerce model encourages community engagement (sharing, following, parties) that drives sales. The platform handles shipping with a flat-rate prepaid label.
Cost: Poshmark’s commission and shipping terms can change. Check its current official fee and shipping pages for the order value, category, and market before setting your floor.
Beginner Rating: ⭐⭐⭐⭐
| Pros | Cons |
|---|---|
| Integrated label workflow | Total cost and label terms require a current check |
| Strong community drives organic traffic | Requires daily “sharing” activity (15-30 min) |
| Great for women’s clothing and brands | Limited to fashion/home categories |
| Social merchandising and sharing tools | Visibility and sale price still depend on the item and demand |
| Authentication for luxury items |
Pro tips for beginners:
- Use Poshmark’s current seller guidance and your own listing analytics; do not treat a fixed sharing schedule as a ranking guarantee
- Share other people’s listings too (community shares lead to reciprocal traffic)
- Leave offer room only when the category evidence and your floor support it
- Lululemon, Nike, Free People, and Anthropologie are the bread-and-butter brands on this platform
Deep dive into Poshmark strategy: How to Sell on Poshmark: Complete Guide.
4. Facebook Marketplace
What it does: Facebook Marketplace can be useful for local pickup, especially for bulky or fragile items. Availability of checkout, shipping, and seller features varies, so build the workflow around what your account and location currently support.
Cost: Verify current Marketplace rules, checkout availability, payment processing, promotion costs, and any local obligations. Do not assume every local or shipped transaction has the same fee or protection.
Beginner Rating: ⭐⭐⭐⭐⭐
| Pros | Cons |
|---|---|
| Local pickup can avoid parcel shipping | No-show, scam, payment, and personal-safety risks need a plan |
| Existing local discovery | Protections vary by transaction method |
| Best option for large/heavy items | Lots of lowball offers to manage |
| Instant cash in hand | Shipped items have limited categories |
| Optional paid promotion may be available |
Pro tips for beginners:
- Meet in public places for all transactions (police station parking lots are ideal)
- Respond when you can do so safely and consistently; speed does not make a buyer legitimate
- Set a negotiation range from your floor and local comps rather than a universal markup
- Use our Negotiation Range Calculator to set a walk-away point from realistic costs and proceeds before negotiating
Read our complete Facebook Marketplace selling guide for strategies that actually work.
Price Research: Know What Things Are Worth
Price research helps you avoid anchoring on hopeful listings. These tools surface different kinds of evidence; you still have to match the item, condition, quantity, date, shipping, and transaction terms.
5. Underpriced App
What it does: Underpriced uses photos or item details to organize an identification and resale-research estimate, including comparable evidence, possible selling channels, and deal math. It is a fast second opinion, not an authentication, appraisal, or promise that the item will sell.
Cost: The current product configuration includes 5 one-time analysis credits on the free tier. Paid tiers have defined monthly analysis and inventory limits; they are not unlimited. Check the live pricing screen before subscribing because plan visibility, introductory pricing, and limits can change.
Beginner Rating: ⭐⭐⭐⭐⭐
| Pros | Cons |
|---|---|
| Instant flip-or-skip decisions while sourcing | Free plan limited to 10 analyses |
| Photo-assisted identification and resale research workflow | Output still requires identifier, condition, and comp verification |
| Suggests a platform to investigate | Suggestions still require a current demand and fee check |
| No expertise required-the AI does the research | |
| Free tools library (profit calculators, fee comparisons) |
Pro tips for beginners:
- Use Underpriced while sourcing when it helps structure the research, but do not buy until the identity, sold evidence, condition, and costs support the decision
- Use the public Flip Profit Calculator, ROI Calculator, and Platform Fee Comparison when those are the next job
- Use photo analysis to organize an uncertain identification and research path, not to authenticate an item or guarantee a resale value
- Verify identifiers, condition, and close completed sales before buying
6. eBay Sold Listings (Built-In)
What it does: eBay’s sold filter shows completed public results, while eBay Product Research can provide a longer history and accepted Best Offer visibility for eligible sellers. Neither automatically tells you whether the model, condition, bundle, shipping, or sale terms match your item.
Cost: The public sold filter is built into eBay. Product Research availability and account requirements can change; check the current official help page.
Beginner Rating: ⭐⭐⭐⭐⭐
| Pros | Cons |
|---|---|
| Public sold filter is easy to access | Public history and visible price details can be limited |
| Shows real completed transactions | Can be slow to search on mobile while sourcing |
| 90 days of historical data | Requires manual searching for each item |
| Shows listing photos and disclosed terms | Best Offers, bundles, errors, and shipping treatment can obscure the comparable amount |
Pro tips for beginners:
- Start with Sold Items for demand evidence. Use active listings to understand current competition, not as proof that buyers accept those prices
- Search using the specific model number or descriptive keywords (brand + model + condition)
- Look at the most recent 10-15 sold listings to get an average, not just one outlier sale
- Sort in more than one way to inspect the spread, then remove mismatched models, conditions, bundles, and outliers before choosing a range
Learn the full methodology in our eBay sold listings comp research guide.
7. WorthPoint
What it does: WorthPoint provides historical marketplace and auction records that can help with vintage, antique, collectible, and low-frequency items when recent public sold results are sparse. Historical records still need exact-item and condition checks.
Cost: Check WorthPoint’s current official pricing, trial, renewal, cancellation, and record-access terms before subscribing; static subscription and database-size claims age quickly.
Beginner Rating: ⭐⭐⭐
| Pros | Cons |
|---|---|
| Long historical research window | Subscription may not pay for itself for common inventory |
| Covers auction houses, not just eBay | Interface can be clunky |
| Essential for vintage and antique items | Overkill for common items (eBay sold comps work fine) |
| Image-based search available |
Pro tips for beginners:
-
Don’t subscribe automatically. Add a historical database when sparse comps are a recurring bottleneck and the expected decisions justify the cost.
-
If a trial is available, read the current conversion and cancellation terms first and use it for a prepared research list
-
Use any mark-identification reference as a lead for pottery, silver, or porcelain; verify the mark against a specialist source before naming the maker
Listing Tools: Create Better Listings Faster
Listing tools can reduce repetitive work, but they do not verify the item for you. Review every identifier, condition statement, category, and platform field before publishing.
8. Crosslisting Apps (Vendoo, List Perfectly)
What they do: Reuse listing data across supported marketplaces and help track where an item is active. Crosslisting can expand exposure, but it also creates delisting, order-collision, policy, and platform-field work.
Cost: Check Vendoo and List Perfectly’s current official plan pages for listing allowances, marketplace support, add-ons, trials, renewal, and cancellation terms. These change too often for a static dollar table.
Beginner Rating: ⭐⭐⭐⭐
| Feature | Vendoo | List Perfectly |
|---|---|---|
| Trial or free allowance | Verify current terms | Verify current terms |
| Platforms supported | Verify the marketplaces you actually use | Verify the marketplaces you actually use |
| Mobile workflow | Test on your device | Test on your device |
| Analytics | Compare the plan-specific fields | Compare the plan-specific fields |
| Inventory and delisting | Test order-collision handling | Test order-collision handling |
| Total cost | Include add-ons and listing volume | Include add-ons and listing volume |
Pro tips for beginners:
- Use a current trial or free allowance, if offered, to test one small batch before paying
- Measure whether the second platform produces incremental sales after the extra maintenance, not just more active listings
- Adjust category, title, description, condition, shipping, and item specifics to each platform’s current rules
- Use our Crosslisting Platforms Comparison tool to decide which platforms to crosslist to for each category
Our full crosslisting guide for resellers breaks down the complete crosslisting strategy.
9. Photo Background Removers (PhotoRoom, Remove.bg)
What they do: Remove or replace a photo background. This can make a listing easier to scan, but it must not erase straps, lace, transparent edges, flaws, labels, or included accessories.
Cost: Check PhotoRoom and remove.bg’s current official plan, watermark, resolution, credit, batch, and commercial-use terms before choosing one.
Beginner Rating: ⭐⭐⭐⭐⭐
| Pros | Cons |
|---|---|
| Transform amateur photos into professional listings | Free versions have watermarks or resolution limits |
| Can speed up a repeatable edit | Can cut into item edges or remove real detail |
| No photography setup needed | Not necessary for all items (some look better in context) |
| Works on any smartphone |
Pro tips for beginners:
- Test both tools on your real inventory and inspect the full-resolution edges before choosing
- Keep the background clean and consistent without hiding scale, texture, or flaws; follow each marketplace’s image rules
- For clothing, choose a flat lay, hanger, or form that represents shape accurately and still allows detailed measurement and flaw photos
- Read our product photography guide for complete tips on taking photos that sell
10. Listing Title Optimizer
What it does: The free Listing Title Optimizer reviews title structure and suggests clearer brand, model, size, color, material, and condition terms. It cannot verify the item or guarantee search placement.
Cost: Free (Underpriced tool).
Beginner Rating: ⭐⭐⭐⭐⭐
| Pros | Cons |
|---|---|
| Completely free to use | Suggestions still require manual review |
| Tailored suggestions per platform | |
| Helps remove filler and surface missing identifiers | |
| Keeps the final judgment with the seller |
Pro tips for beginners:
- eBay titles allow up to 80 characters, but use only accurate, useful terms; padding a title is not optimization
- Include brand, model, size, color, condition, and key features in your title
- Skip filler words like “WOW,” “LOOK,” “L@@K,” and “AMAZING DEAL”-they waste character space and don’t match search queries
- Use the optimizer while learning, then keep it for titles where the exact model, material, or condition wording is difficult
Read our complete guide to writing listings that sell for description templates and formatting strategies.
Shipping Tools: Save Money on Every Package
Shipping can erase the margin when the packed weight, dimensions, zone, insurance, signature, supplies, and return risk are guessed. Measure the finished parcel and compare the actual services available for that order.
11. Pirate Ship
What it does: Pirate Ship offers access to supported USPS, UPS, and international label services through a web workflow. Compare its quote with the marketplace label and carrier options for the exact packed parcel.
Cost: Pirate Ship currently advertises no monthly subscription, but verify its official pricing, supported services, insurance, adjustments, and international terms before relying on that model.
Beginner Rating: ⭐⭐⭐⭐⭐
| Pros | Cons |
|---|---|
| Side-by-side supported service quotes | Doesn’t integrate directly with all platforms |
| No subscription fees or markups | Requires a printer (home inkjet works fine) |
| Simple Rates feature simplifies zone-based pricing | No built-in pickup scheduling |
| Supports USPS, UPS, and GlobalPost | |
| Batch label printing for multiple orders |
Pro tips for beginners:
- Compare Simple Export Rate with marketplace and carrier options, customs duties, tracking, insurance, exclusions, and delivery expectations
- Use Simple Rates only when the actual package qualifies and the total delivered-cost strategy protects the margin
- Connect your eBay store directly to import orders and print labels in batches
- Use Pirate Ship for packages NOT shipped through the platform’s built-in label system (compare costs-sometimes Pirate Ship is cheaper, sometimes the platform’s rate wins)
Compare shipping options beforehand with our First Class vs. Priority Calculator and Shipping Box Size Calculator.
Our shipping guide for resellers explains how to compare current services, packed dimensions, coverage, and marketplace labels.
12. USPS Mobile App + Informed Delivery
What it does: USPS tools can schedule eligible pickups, track shipments, and locate facilities. Informed Delivery can preview eligible incoming mail and packages. Availability and service rules depend on the address and mail class.
Cost: Completely free.
Beginner Rating: ⭐⭐⭐⭐⭐
| Pros | Cons |
|---|---|
| Eligible package pickup may avoid a separate trip | Eligibility depends on address, service, and current USPS rules |
| Track supported outgoing and incoming packages | Scans and timing are not guaranteed |
| Find nearest drop-off locations and hours | App can be glitchy |
| Informed Delivery shows incoming mail |
Pro tips for beginners:
- Schedule pickups the night before for next-day carrier pickup-leave packages by your mailbox or door
- Confirm the pickup request, placement instructions, package eligibility, and local security before leaving parcels out
- Measure your own avoided trip time instead of assuming a standard daily saving
- Use the app’s price calculator to double-check weights/dimensions before printing labels
Bookkeeping & Taxes: Track Your Money
Bookkeeping is easier when it starts with the first purchase. A Form 1099-K threshold is an information-reporting rule, not the point at which income becomes taxable. The IRS currently says third-party settlement organizations generally report when payments exceed $20,000 and 200 transactions, though a platform may issue a form below that level; taxable income still must be reported whether or not a form arrives. Verify the current rule on the IRS Form 1099-K page and consult a qualified tax professional for your situation.
13. Spreadsheet Tracking (Google Sheets / Excel)
What it does: A simple spreadsheet is still the most flexible and cost-effective way for beginners to track inventory, sales, expenses, and profit. You don’t need expensive software at the start-a well-organized spreadsheet handles everything.
Cost: Free (Google Sheets) or included with Microsoft 365.
Beginner Rating: ⭐⭐⭐⭐⭐
What to track in your spreadsheet:
| Column | What to Record |
|---|---|
| Date Purchased | When you bought the item |
| Item Description | What the item is (brand, model, size) |
| Source | Where you bought it (Goodwill, garage sale, etc.) |
| Cost | What you paid |
| Date Listed | When you listed it for sale |
| Platform | Where you listed it (eBay, Mercari, etc.) |
| Date Sold | When it sold |
| Sale Price | Final selling price |
| Fees | Platform + payment processing fees |
| Shipping Cost | Postage + materials |
| Net Profit | Sale price - cost - fees - shipping |
Pro tips for beginners:
- Start your spreadsheet from day one-don’t plan to “catch up later” (you won’t)
- Keep a contemporaneous business-mileage log with date, destination, purpose, and miles. The IRS lists 72.5 cents per business mile for January–June 2026 and 76 cents for July–December 2026; eligibility and substantiation still matter, so check the official mileage-rate page
- Use conditional formatting to color-code: green for sold items, yellow for listed, red for items in your death pile
- Use our Reseller Tax Deduction Calculator alongside your spreadsheet to estimate your tax liability throughout the year
Our bookkeeping basics guide for resellers includes downloadable templates to get started.
14. Wave Accounting
What it does: Wave offers accounting, invoicing, payment, and related workflows whose availability varies by plan and region. It can add structure when a spreadsheet no longer matches your transaction volume or reconciliation needs.
Cost: Check Wave’s current official plan and payment pages for accounting, receipt capture, support, bank connections, and transaction fees. Do not assume every feature remains free.
Beginner Rating: ⭐⭐⭐⭐
| Pros | Cons |
|---|---|
| More structured than a basic spreadsheet | Learning curve for non-accountants |
| Professional invoicing | No built-in inventory management |
| Receipt scanning with mobile app | Limited integrations with selling platforms |
| Tax-ready financial reports | Customer support limited on free plan |
| Bank account connections |
Pro tips for beginners:
- Start with the simplest system you will actually reconcile; migrate when the transaction volume or reporting need justifies it
- Connect your bank account and credit card for automatic transaction importing
- Use the receipt scanning feature-photograph every thrift store receipt, shipping receipt, and supply purchase
- Generate a “Profit & Loss” report quarterly to see your actual business performance
- Learn more about reseller tax obligations in our complete tax deductions guide
Inventory & Workflow: Stay Organized
As your operation grows from 10 items to 50 to 200+, organization becomes critical. These tools prevent the “death pile” and keep your workflow efficient.
15. Inventory Management System
What it does: Tracks every item in your inventory-where it’s listed, how long it’s been listed, what you paid, and whether it’s sold. For beginners, this can be as simple as a spreadsheet (see #13 above) or a dedicated app. Dedicated options include Vendoo’s built-in inventory (if you’re already crosslisting), SellerToolkit, and the basic tracking in each selling platform’s seller dashboard.
Cost: Spreadsheets and platform dashboards may be available at no additional charge; dedicated inventory tools have changing plans and usage limits. Verify current pricing and export access before committing your records.
Beginner Rating: ⭐⭐⭐⭐
| Approach | Best For | Cost |
|---|---|---|
| Spreadsheet (Google Sheets or Excel) | Small inventory and custom fields | Existing account or software terms |
| Crosslisting inventory | Sellers already using that service | Verify plan inclusion and limits |
| Platform dashboards | Single-platform inventory | Verify account access and exports |
| Dedicated inventory app | Larger or multi-channel workflows | Verify current pricing, limits, and portability |
Pro tips for beginners:
- Give every item a simple SKU, but put it on a removable storage tag or bag rather than writing on or sticking adhesive to the product or original label
- Track your days to sell metric-this tells you which categories are moving fast and which are dead weight
- Use our Inventory Turnover Calculator to measure how efficiently your inventory is converting to cash
- Read our guide to avoiding the death pile when unlisted or stale inventory begins to exceed the time and storage you assigned to it
The Beginner Starter Stack: Your Complete Setup
Not sure which tools to start with? Use the first setup to cover the jobs, then build a paid stack from the bottleneck you can measure.
A Starter Stack Without Required Paid Software
This setup avoids a required software subscription. Selling fees, postage, supplies, returns, and optional services still apply:
| Need | Tool | Cost |
|---|---|---|
| Selling | One fitting marketplace | Account may be free; transaction and optional fees vary |
| Price Research | eBay sold filter + Underpriced (5 one-time free analysis credits in the current product configuration) | Verify live terms |
| Photos | Phone camera + optional background tool | Verify live terms |
| Listing Titles | Listing Title Optimizer | Free |
| Shipping | Marketplace labels, Pirate Ship, and carrier quotes | Compare the actual parcel |
| Shipping Pickup | USPS pickup tools when the address and service qualify | Verify eligibility |
| Bookkeeping | Google Sheets | Free |
| Profit Calculator | Flip Profit Calculator | Free |
| Fee Comparison | Platform Fee Comparison | Free |
| Required software subscription | None in this setup; verify live terms |
This stack covers the core workflow without requiring a paid software bundle. Marketplace fees, postage, supplies, returns, and optional services still cost money even when the software has no monthly charge.
Start here even if you have a budget. Pay when you can name the repeated bottleneck, measure the improvement, and cancel or export cleanly if the tool does not earn its place.
A Paid Stack Built Around the Bottleneck
Once sales are consistent, add one paid capability at a time:
| Need | Possible tool | Decision rule |
|---|---|---|
| Selling limits or account tools | Marketplace store subscription | Add only when current fee and feature math beats the subscription |
| More photo analyses | Current Underpriced paid tier | Choose the real monthly limit and inventory allowance you need; no tier is unlimited |
| Crosslisting | Vendoo or List Perfectly | Add when measured duplicate-listing and delisting work exceeds the cost |
| Photos | PhotoRoom, remove.bg, or another editor | Add when the paid output solves an actual watermark, resolution, or batch bottleneck |
| Listing titles | Listing Title Optimizer | Keep using the public tool when it is sufficient |
| Shipping | Marketplace, Pirate Ship, or carrier tools | Choose per parcel and marketplace protection |
| Bookkeeping | Spreadsheet or accounting software | Upgrade for reconciliation and reporting needs, not a revenue vanity threshold |
There is no universal revenue point where this stack pays. Compare the monthly cost with actual insertion fees avoided, hours saved, errors prevented, incremental sales, and the value of cleaner records. Paid analysis still supports a decision; it does not remove uncertainty from a deal.
ROI check: Review each subscription separately after a full billing cycle. Keep it only if the measured time, error reduction, or incremental net profit exceeds its cost by a margin that matters to you.
Tools You Don’t Need Yet (But Will Later)
Some tools become useful only when a specific workflow demands them. Revenue alone is not the trigger:
WorthPoint: Consider a historical database when you repeatedly research sparse-sale vintage, antique, or collectible items and the decisions justify the current subscription.
Paid analytics tools: Start with the marketplace analytics already available to your account. eBay Product Research is now the relevant name for the former Terapeak workflow; add another paid product when a specific unanswered question recurs.
Barcode scanning apps (ScoutIQ, etc.): Most relevant to barcode-heavy book and media workflows. Test one only when that inventory is a meaningful part of your sourcing.
Paid photo editing suites (Lightroom, etc.): Clear, color-accurate photographs and complete detail coverage matter more than elaborate editing. Add a suite when repeatable color or batch work justifies it.
Dedicated shipping stations: Use an accurate scale and a label method the carrier can scan. Add a thermal printer when your measured label volume, ink, tape, and handling time make the current price worthwhile.
How to Set Up a First Tool Stack
Set up only what you need to move one owned item through the workflow:
Choose the selling destination
- Pick one marketplace that fits the item, buyer, shipping, and return workflow
- Read its current identity, payout, fee, prohibited-item, condition, return, and shipping rules
- Complete only the account setup required for that marketplace
Build the listing and fulfillment path
- Photograph the item accurately, including identifiers and flaws
- Pack a representative parcel, then measure and weigh it
- Compare the marketplace label with eligible third-party or carrier quotes
Record and publish
- Create your tracking spreadsheet in Google Sheets (use the columns from the table above)
- Bookmark the Underpriced free tools page and only the calculators needed for the item
- Publish one accurate listing, then review the live title, photos, price, shipping, and return terms
Account review, identity checks, payout setup, photography, and a safe shipping plan may take longer than one sitting. Completion matters more than an invented 90-minute promise.
Free Tools You Should Bookmark Right Now
In addition to the major apps above, these free tools from Underpriced deserve a permanent spot in your browser bookmarks:
| Tool | What It Does | When to Use It |
|---|---|---|
| Flip Profit Calculator | Calculate net profit after all costs | Before buying any item |
| Platform Fee Calculator | See fees across eBay, Mercari, Poshmark | Choosing where to list |
| ROI Calculator | Calculate return on investment | Evaluating sourcing decisions |
| Platform Fee Comparison | Side-by-side fee comparison | Deciding where to sell |
| Break-Even Calculator | Minimum price to not lose money | Setting pricing floors |
| Listing Title Optimizer | Optimize titles for search | Creating every new listing |
| Brand Resale Value Index | Check brand resale value tiers | While sourcing clothing |
| Seasonal Listing Calendar | Capacity-aware plan from a verified demand date | Scheduling seasonal batches |
| Condition Grade Calculator | How condition affects price | Pricing used items |
| Shipping Box Calculator | Find optimal box size | Before shipping |
Open the Flip Profit Calculator before a sourcing decision and enter the realistic sale, fees, shipping, packing, and purchase cost. The calculator checks the arithmetic; it cannot verify the sale price or guarantee the item will sell.
Frequently Asked Questions
What is the best app for selling stuff in 2026?
There is no best app for every item. Match the category, likely buyer, search behavior, sale format, fees, shipping, returns, and your ability to manage the order. Use the Platform Fee Comparison for a scenario, then confirm the marketplace’s current terms.
Do I need to pay for any apps to start reselling?
You do not need a paid software bundle to make a first listing, but selling is not cost-free: marketplaces, payments, postage, packing, returns, inventory, and taxes can create costs. The current Underpriced configuration includes 5 one-time free analysis credits. Verify every third-party tool’s live terms before assuming a free tier covers your use.
What’s the best app for checking resale prices?
Start with exact completed sales when enough close matches exist. Use eBay Product Research for a longer history and accepted Best Offer details when available, a historical database for sparse items, and photo-assisted analysis to organize uncertain identification. None is complete on its own; verify the identifier, condition, bundle, date, and sale terms.
Is crosslisting worth it for beginners?
It is worth testing when a second marketplace reaches a distinct buyer and you can delist immediately after a sale. Track incremental sales, time, order collisions, and subscription cost on a small batch before scaling. See the crosslisting guide.
What shipping app saves the most money?
No app is cheapest for every parcel. Pack first, then compare the marketplace label, Pirate Ship, and eligible carrier services using the exact weight, dimensions, origin, destination, coverage, signature, and protection rules.
How do I handle taxes as a reseller?
Track purchases, sales, fees, shipping, supplies, refunds, and business mileage from day one. The current federal TPSO reporting threshold is generally over $20,000 and more than 200 transactions, not $600, but a form can still arrive below it and taxable income must still be reported. Business inventory and personal items sold at a gain can be treated differently, and not every outlay is deductible in the same way. Use the Tax Deduction Calculator only as an estimate and confirm your facts with current IRS guidance or a qualified tax professional.
Do I need a thermal label printer?
Not necessarily. Use any label method that produces a correctly sized, weather-protected, carrier-scannable barcode without covering seams. Compare thermal-printer cost with your measured label volume, ink, tape, and handling time; there is no universal shipment-count trigger.
What app do I need for product photos?
A smartphone can be sufficient when it produces sharp, color-accurate images of the full item, identifiers, texture, scale, included parts, and every flaw. A background remover is optional and must not erase evidence. See the product photography guide.
How much time do these tools save per week?
There is no honest universal number. Time the task before and after on a representative batch, include correction and maintenance time, and keep the tool only if the measured saving matters to your operation.
Which tool should I set up first?
Set up the marketplace that fits the item first, then create the recordkeeping row before publishing. Photograph accurately and build the shipping path using the marketplace or carrier options that preserve protection and margin. Extra apps can wait.
Start Your Reselling Journey with the Right Tools
You don’t need dozens of apps, expensive subscriptions, or complicated software to make money reselling. You need a selling platform, a way to research prices, a method to ship, and a system to track your money.
The tools in this guide cover the main jobs, but no stack makes the operation profitable. Profit still depends on the item, purchase, evidence, execution, fees, fulfillment, returns, and time.
Here’s your immediate action plan:
- Choose one item you already own and one marketplace that fits it
- Record the identifiers, condition, and realistic close sales
- Run the scenario through the Flip Profit Calculator
- Publish one accurate listing with complete photos and measurements
- Buy the label through the option that preserves protection and margin
If a photo would help organize the identification and research, try Underpriced. The current free tier includes 5 one-time analysis credits. Treat the result as a research aid, then verify the item and completed-sale evidence before spending money.
One accurate listing gives you better feedback than another hour spent assembling a theoretical app stack.