80+ Free Reseller Tools

Calculate Poshmark fees and seller proceeds, compare eBay managed-payment profit with PayPal direct-sale fees, and audit payouts across major resale marketplaces.

Model Shopify contribution per order and a repeat-order monthly sensitivity after payment fees, plan and app overhead, COGS, fulfillment, marketing, discounts, and returns.

Calculate capital, storage, service, and risk costs, then test whether an unsold item earns enough extra net value to justify more holding time.

Calculate a gold jewelry metal floor and compare buyer offers after karat, known non-gold weight, a user-entered dated spot price, and buyer spread.

Calculate sterling silver scrap value from weight, purity, a current quote, and refiner payout, then compare that floor with resale net.

Score supplier evidence, record a sample-lot assay, and solve a wholesale 925 jewelry buy ceiling after landed cost, defects, sell-through, fees, labor, and downside risk.

Compare StockX Listings or Verified Marketplace payout against GOAT rating-based commission, seller fee, cash-out fee, buy cost, and issue reserve before listing sneakers.

PayPal fee calculator for 2026: compare US Goods and Services, PayPal Checkout, Pay with Venmo, card, QR, international add-on, and net payout before quoting a buyer.

Calculate the minimum resale price that covers buy cost, seller-paid shipping, supplies, risk reserve, platform fees, labor value, and offer buffer across eBay, Mercari, Poshmark, Depop, Facebook local and shipped checkout, Whatnot, Etsy, and Vinted.

Estimate Amazon FBA monthly storage, aged-inventory surcharge exposure, removal break-even, and sell-through risk before sending inventory.

Depop takes no selling fee in the US, UK and Australia; US sellers pay 3.3% + $0.45 processing on the order total. Work out your payout with region, shipping, tax, Boost, bundle count and break-even price.

Calculate reseller credit card rewards after platform fees, interest, annual-fee allocation, redemption value, and resale profit.

Model eBay Promoted Listings General ad fees on total sale amount, then calculate per-sale profit, break-even view lift, and max safe ad rate.

Estimate taxable income after COGS, platform fees, shipping, and supplies. See federal income tax and self-employment tax before quarterly payments.

Calculate true retail arbitrage buy cost after sales, coupons, sales tax, cashback, card rewards, rebates, quantity, and resale fees. Use the effective COGS and decision panel before buying.

Convert margin, markup, and pricing multipliers, then test whether marketplace fees, fixed fees, and seller-paid shipping still leave the target net margin.

Calculate reseller ROI after platform fees, buyer shipping, seller shipping, packing, reserve, labor, hourly target, days to sell, and target buy price. See the decision before sourcing.

Estimate reseller inventory COGS after discounts, average state sales tax, exact rate overrides, resale certificate status, and purchase-use guardrails.

Calculate net profit, ROI, margin, break-even price, and target sale price after marketplace fees, shipping, reserves, and labor.

Calculate Whatnot commission by category and sales tier, processing, seller-covered shipping discounts, net profit, and live-auction floor price before a show.

Decide whether to accept, counter, or wait on a reseller offer after fees, shipping, holding time, target profit, and ROI floor.

Compare current sold comps, trade-in offers, platform fees, battery health, lock status, accessories, and condition before listing used electronics.

Model liquidation pallet profit after manifest risk, freight, buyer premium, storage, platform fees, shipping, labor, and target hourly return.

Shortlist PSA, BGS, SGC, or CGC by live tier constraints, then compare exact graded sold comps with the raw-card exit and all-in grading cost.

Model return rate, damaged returns, shipping loss, fees, and restock value to see how returns change reseller profit before you price inventory.

Set your eBay Best Offer auto-accept, decline, and counter thresholds with fee-basis math for resellers.

Calculate reseller tax savings with IRS 2026 split-year rates: 72.5¢ Jan-Jun and 76¢ Jul-Dec. Track sourcing and shipping trips.

Calculate whether an inventory storage unit pays for itself using rent, inventory value, sell-through, margin, insurance, and access costs.

Compare eBay vs Mercari with fee math and item-category routing, then rank net profit across eight marketplaces using the same sale, shipping, cost, and target-profit inputs.

Decide whether to run an eBay auction or fixed-price listing by comparing expected profit, low-close risk, reserve cost, fee basis, and time cost.

Find the bundle discount that clears your target profit after platform fees, shipping savings, item costs, return-risk reserve, and sell-through probability.

Use COGS, average inventory, unit movement, stale stock, revenue, and storage cost to decide whether to keep sourcing, reprice, or clear inventory.

Allocate purchase price, inbound shipping, tax, repairs, and supplies across mixed resale inventory, then export a traceable per-item cost basis.

Plan USPS zone risk before listing by combining regional zone estimate, official zone override, postage quote, package dimensions, platform fee, and target profit.

Use current sold comps, platform fees, seller shipping, prep cost, condition, and target cost per wear to decide whether to wear, list, or pass on a resale-recovery buy.

Calculate reorder points, safety stock, MOQ exposure, budget risk, and one-off inventory guardrails before restocking resale inventory.

Build a controlled listing-time test for eBay, Poshmark, Mercari, Depop, Whatnot, and Facebook using category fit, platform mechanics, batch size, and measured first-24-hour results.

Calculate a cost-and-ROI price floor, target close price, live accept/counter/decline decision, and editable buyer response script with optional fee-basis add-on before replying to an offer.

Estimate condition-adjusted resale price, repair ROI, net payout, and disclosure copy from clean sold comps, category, packaging, defects, fees, and return reserve.

Translate eBay, Poshmark, Mercari, and Depop condition wording with flaw-level guardrails, copyable notes, photo checklists, and source-backed disclosure guidance.

Paste a listing title and description to flag policy-risk wording before posting on eBay, Poshmark, Mercari, Depop, or Facebook Marketplace.

Clean old eBay listing HTML by stripping active content, risky attributes, external links, and insecure media while preserving readable product text.

Generate factual, copy-ready eBay listing descriptions for apparel, collectibles, electronics, and lots without inventing condition or policy details.

Turn brand, model, size, color, condition, and keywords into source-aware marketplace titles with character counts, warnings, and crosslisting variants.

Model whether Vendoo, Crosslist, List Perfectly, or manual crosslisting is worth it for your listing volume, auto-delist needs, and saved time.

Convert labeled shoe sizes across US men, US women, UK, EU, and CM/JP, then copy a buyer-facing size note with measurement caveats.

Calculate packed box dimensions, USPS cubic eligibility, carrier size limits, DIM-weight handoff risk, and source-backed box-fit notes before listing.

Generate deterministic reseller SKUs, local QR labels for inventory data or live listing URLs, printable PNGs, and downloadable CSV rows tied to retrieval evidence.

Build sold-comp research links for eBay Advanced Search, eBay Product Research, Mercari, and Poshmark, plus a 7-comp pricing worksheet with caveats.

Build up to five relevant Depop hashtags from verified brand, item, style, era, material, and colour evidence, plus a factual listing draft.

Decode the documented nine-character KitchenAid stand-mixer serial format into candidate year and production-week ranges without hiding era ambiguity.

Decode an MMYY or split Coleman lantern date stamp, then compare the candidate year with a sourced U.S. model-year reference subset.

Match a Leica camera-body serial to a versioned set of public model and allocation-year ranges, with gaps and authentication limits kept visible.

Read the common Seiko year-month serial pattern, split the caliber and case-design code, and keep decade and Seiko 5 Sports exceptions visible.

Type the code from a Nike shoe or clothing tag to see the model, colorway, kids' and women's versions, factory and production dates, plus what it sells for. Works with style codes, UPCs and old tag codes.

Use Levi's tab, care tag, origin, selvedge, button-stamp, condition, and sold-comp evidence before buying or listing vintage denim.

Screen a used GPU by model, sale year, seller history, test evidence, thermals, fan noise, BIOS status, warranty, ask price, and sold comps.

What 24 vintage Pyrex patterns sold for on eBay from July to October 2026, one piece and sets, plus a quick check for the piece in your hand.

Use sticker type, box number, release context, sticker condition, authentication-code evidence, seller risk, and exact sold comps before buying a Funko Pop.

Type the code from a Lululemon size dot or tag to look up the style, then see what used Lululemon sold for on eBay before you price it.

Decode Coach creed, serial, white-tag, factory/outlet, and style-number evidence, then route to photos, sold comps, or a verification stop.

Separate a current-format North Face base-style candidate from attached tag text, then route to official product evidence and matching sold comps without over-decoding the label.

Separate Patagonia style numbers from RN51884, PO, and season/year clues before matching product photos, Worn Wear, condition, and sold comps.

Compare tag family, RN/company identity, origin, care text, stitching, graphic date, condition, and sold comps before dating or pricing a vintage T-shirt.

Classify Base Set Shadowless, 1st Edition Shadowless, or Unlimited evidence from visible print clues before pricing or grading Pokemon cards.

Preview a local card photo, compare scanner and app workflows, correct the exact printing, then normalize current sold comps before choosing raw sale, grading, bundle, renegotiate, or skip.

Calculate dimensional weight with current carrier-specific rounding and divisors, compare USPS, UPS, and FedEx rating weight, and check USPS Cubic fit before listing bulky inventory.

Check books, DVDs, CDs, sheet music, charts, comics, magazines, blank media, games, and mixed bundles against USPS Media Mail eligibility rules before you buy the label.

Enter folded clothing dimensions, choose a mailer that closes without strain, and pre-check the current USPS Ground Advantage soft-pack cubic tier before measuring the sealed parcel.

Compare USPS Ground Advantage and Priority Mail by packed weight, with First Class kept as a legacy package search alias.

Estimate a Canadian personal-use buyer’s landed cost from value for duty, mail or courier thresholds, HS-code duty rate, origin evidence, current casual-goods tax, FX, insurance, and carrier fees.

Research an exact branded item with current sold comps, active listings, fees, shipping, and target profit before deciding to source, renegotiate, or pass.

Use official console launch milestones plus exact used-bundle sold comps, testing evidence, costs, and target profit to decide whether to source or pass.

Work backward from a demand date you verified using inventory count, prep time, daily listing capacity, and launch lead time to avoid missing the selling window.

Record exact PS4 system-software evidence, hardware tests, and current sold comps before claiming any price difference or choosing a sourcing ceiling.

Identify an exact Starbucks cup, verify condition and completeness, enter current sold comps, and calculate a fee-aware maximum sourcing price.

Screen a used mattress for federal labels and recalls, state-rule evidence, platform policy, condition, local pickup economics, and a maximum acquisition price.

Distinguish official eBay Refurbished grades from seller-refurbished items, verify listing evidence, and calculate a grade-matched sourcing ceiling.

Lock a maximum profitable bid after resale fees, acquisition tax, both shipping legs, and target profit, then follow a manual countdown without server-sync claims.

Clear recall, marketplace, exact-match, condition, documentation, sold-comp, and margin gates before buying retail inventory to resell.

Record a verified local thrift sale, start and end dates, color, participation rules, checkout tax, and prep cost, then calculate whether a tagged item meets your sourcing ceiling.

Use current verified quotes and exact sold comps to choose a legitimate iPhone exit channel after fees, obligations, device evidence, and sourcing cost.