Why should I pay when eBay sold is free?

Time is money. Checking eBay sold takes 2-3 minutes per item: searching, scrolling through results, mentally calculating fees and shipping. At a garage sale with 50 potential items, that's 2+ hours of standing around researching. We do it in 30 seconds with instant profit calculations, platform fee breakdowns, and red flags. Same 50 items? 25 minutes total. Plus everything is saved, tracked, and organized. The paid tiers cost less than one decent flip - and you'll find that flip faster.

How is this different from checking eBay sold or asking AI myself?

Three things: speed, accuracy, and tracking. Asking ChatGPT or similar gives you generic guesses without real market data. We combine instant AI identification with actual sales data, then automatically calculate platform fees, shipping estimates, and net ROI. Plus, every analysis is saved to your account so you can track what you've researched, compare items over time, and move items directly to your Flip Tracker.

Where does the price data come from?

We aggregate pricing data from multiple sources including completed sales, active listings, and historical market trends. The AI identifies your item from the photo, cross-references comparable items across platforms, and synthesizes this data to provide accurate market values with confidence levels based on how many data points we found.

What can I analyze? Does it work on any item?

Anything you can photograph. Electronics, clothing, collectibles, toys, tools, furniture: if people buy it on eBay, we can analyze it. Works with photos you take, screenshots from FB Marketplace, OfferUp, Craigslist, or any other source. The AI is trained on millions of product images.

How accurate is the net profit calculation?

We use current platform fee rates (eBay 13.25%, Mercari 10%, Poshmark 20%, FB Marketplace 0%). Shipping estimates are based on typical costs for the item category and size. Your actual results may vary slightly based on your negotiated shipping rates or promotional fee discounts, but you'll be within a few dollars.

What's the Flip Tracker?

Built-in inventory management. When you decide to BUY an item, add it to your tracker in one click. Track what you paid, where you're listing it, and record the sale when it sells. Get real P&L numbers, ROI by category, average days to sell, and exportable reports for taxes.

Do I need to download an app?

No app required. Underpriced is a web app that works in any browser (Chrome, Safari, Firefox) on desktop or mobile. Just go to underpriced.app and you're ready to go. Add it to your home screen for quick access while sourcing.

What if the AI makes a mistake?

That's why we include Sold Comps links with every analysis. One click takes you directly to eBay Sold listings, Poshmark, Mercari, and Terapeak so you can verify the price yourself in seconds. See exactly what similar items actually sold for. We show you confidence levels and data points too — low confidence means fewer comps were found, so hit those links and double-check. The AI does the heavy lifting, but you always have the tools to verify.

Can I use this at thrift stores or garage sales?

Absolutely, that's what it's built for. You need cell service or WiFi for the AI analysis (it runs in the cloud). Most places have signal. If you're in a dead zone, snap photos and analyze them when you get signal, or save them for later.

Is there a free plan?

Yes! Get 5 free analyses with all AI features included — Sold Comps, Due Diligence, Fake Check, Negotiator, Help Me Sell, and FlipExpert AI. No credit card required. It's enough to test the tool and see if it fits your workflow. When you're ready to scale, paid plans start at just $3/month.

eBay Authenticity Guarantee Seller Guide (2026): Categories, Thresholds, and Risk-Control Workflows

Authentication-driven categories can be highly profitable on eBay.

They can also be high-friction if your listing quality, condition documentation, and process discipline are weak.

This guide explains how to operate safely and profitably in Authenticity Guarantee workflows in 2026.

If you’re new to policy-sensitive selling, also read eBay VeRO Policy Guide for Resellers (2026).

Why Authenticity Workflows Matter to Resellers

In high-value categories, buyer trust determines conversion.

Authentication programs help buyer confidence but also raise operational expectations for sellers:

Better listing accuracy
More precise condition grading
Stronger pre-ship quality checks
Better documentation of what was actually sold

Sellers who meet these expectations gain repeatability. Sellers who don’t experience costly disputes and account stress.

Where Authenticity Guarantee Impacts Your Workflow

Depending on category rules and thresholds, authentication can influence:

Listing and pricing strategy
Expected delivery timeline communication
Packaging and prep standards
Post-sale customer messaging
Return/dispute handling path

Treat this as an end-to-end process, not just an after-sale checkpoint.

Category and Threshold Awareness (Without Guesswork)

Rules evolve. Avoid static assumptions.

Your operating approach should be:

Confirm current category participation and thresholds in seller policy center
Document category-specific conditions in your SOP
Train intake/listing/packing around those conditions

Never run policy-critical categories on memory from old versions.

The 6-Point Pre-Listing Authentication Readiness Check

Before publishing an item in authentication-sensitive categories, verify:

Brand/model identifiers are complete and accurate
Condition statements map to visual evidence
Accessories/inclusions are explicitly listed
Known defects are documented in both photos and text
Listing avoids unsupported authenticity claims
Pricing is consistent with condition and comp reality

This prevents most avoidable expectation mismatches.

Listing Optimization for Authentication Categories

Title discipline

Include:

Brand
Model/version
Key authentic identifiers when appropriate
Size/spec detail where relevant

Item specifics quality

Use precise specifics to reduce buyer ambiguity and improve relevant search matching.

Description clarity

Your description should be concise and factual:

What is included
Exact condition status
Notable wear points
Any replaced/aftermarket components where relevant

Avoid vague language that creates interpretation risk.

Condition Grading: The Conversion + Dispute Lever

In authentication categories, condition quality and condition honesty are not optional.

Best-practice condition protocol

Use a standard grading rubric by category
Photograph all high-touch wear zones
Provide macro details for serial, tags, or key identifiers where relevant
Disclose all non-original elements

Support condition impact decisions with Condition Grade Impact Calculator 2026.

Case Study: Sneaker Seller Authentication Upgrade

Before

Strong sourcing skills
Inconsistent listing photos and condition disclosures
Higher buyer questions and occasional post-sale friction

Changes

Introduced 6-point readiness check
Standardized photo angle checklist
Added explicit inclusion/exclusion lines in descriptions

60-day result

Improved buyer trust signals
Lower pre-sale confusion
Cleaner transaction outcomes

Same inventory quality, better operational execution.

Pricing Strategy in Authentication Categories

Authentication-enabled categories can command higher buyer trust, but margin still depends on disciplined pricing.

Use this formula for each listing:

Expected market value (comps)
Condition adjustment
Fee and shipping stack
Offer negotiation range
Minimum acceptable net

Use:

Packaging and Chain-of-Custody Discipline

For higher-value authenticated categories, your pre-shipment process should include:

Final condition verification against listing photos
Inclusion verification (laces, cards, dust bags, accessories)
Secure packaging aligned to item fragility/value
Internal checklist signoff before handoff

This is not overkill. It’s risk control.

For broader shipment protection standards, review How to Ship Fragile Items: Complete Guide for Resellers 2026.

Authenticity-Related Dispute Prevention Framework

Prevention at intake

Source only from channels you can document
Flag high-risk inventory for enhanced review

Prevention at listing

Use factual descriptors, not overstatements
Keep photos evidence-driven

Prevention at fulfillment

Validate item identity before packing
Keep process logs for high-value orders

This reduces both real mistakes and weak-claim exposure.

Authentication and Multi-Platform Routing

Not every high-value item should default to eBay.

Compare route economics and risk by platform:

Route to eBay when authentication + demand + net economics align best.

High-Risk Mistakes to Avoid

Using generic “100% authentic” claims without strong listing evidence
Omitting replacements or missing inclusions in description
Pricing based on optimistic comps without condition adjustment
Weak intake documentation for high-value items
Inconsistent photo standards across similar listings

KPI Dashboard for Authentication Categories

Track monthly:

Conversion rate by condition grade
Buyer message rate pre-sale
Dispute/return rate in authentication-sensitive SKUs
Average net payout vs target
Days-to-sale for high-value inventory

Tie decisions to turnover and cash goals with:

FAQ: eBay Authenticity Guarantee for Sellers

Does authentication remove all seller risk?

No. It improves transaction trust but does not replace listing accuracy, condition disclosure, and operational discipline.

Should I mention authenticity repeatedly in titles/descriptions?

Use clear factual language. Avoid spammy repetition and unsupported claims.

What’s the biggest source of avoidable disputes?

Condition mismatch and inclusion ambiguity.

Can authentication categories improve conversion?

Often yes, when listing quality and pricing are competitive.

How do I improve outcomes quickly?

Implement a category-specific checklist for intake, listing, and final pre-ship verification.

30-Day Implementation Plan

Week 1: SOP setup

Define authentication-sensitive category rules
Build 6-point readiness checklist
Establish photo standard templates

Week 2: Listing quality pass

Audit top 50 active high-value listings
Improve condition documentation
Align specifics and descriptions

Week 3: Fulfillment hardening

Add pre-ship verification checklist
Standardize packaging for premium SKUs
Introduce high-value order process log

Week 4: Performance review

Evaluate conversion/dispute metrics
Refine pricing thresholds by condition tier
Re-route weak categories where needed

Final Takeaway

Authenticity Guarantee can be a growth lever for serious resellers—but only when supported by disciplined listing and fulfillment systems.

The sellers who win in 2026 are not just sourcing better inventory. They are running cleaner, evidence-based workflows that protect both trust and margin.

To strengthen policy-safe operations further, pair this with eBay VeRO Policy Guide for Resellers (2026) and eBay Listing Optimization Guide 2026: Get More Views & Sales.