Question 1

What is the official Underpriced website and app listing?

Accepted Answer

The official website is underpriced.app. Official app listings use the Android package com.underpriced.app, the Apple App Store listing id6759008101, and the support email support@underpriced.app.

Question 2

Why should I pay when eBay sold is free?

Accepted Answer

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.

Question 3

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

Accepted Answer

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.

Question 4

Where does the price data come from?

Accepted Answer

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.

Question 5

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

Accepted Answer

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.

Question 6

How accurate is the net profit calculation?

Accepted Answer

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.

Question 7

What's the Flip Tracker?

Accepted Answer

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.

Question 8

Do I need to download an app?

Accepted Answer

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.

Question 9

What if the AI makes a mistake?

Accepted Answer

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.

Question 10

Can I use this at thrift stores or garage sales?

Accepted Answer

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.

Question 11

Is there a free plan?

Accepted Answer

Yes! Get 5 free analyses with all AI features included — Sold Comps, Due Diligence, Authenticity Check, Negotiator, Selling Guide, 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.

Seasonal "Best Time to List" Calendar

What this tool helps you do

Best for

Related tools

Clothing Brand Resale Value Index

Gaming Console Price Cycle Tracker

PS4 Firmware Version Value Guide

Starbucks Tumbler Color Value Chart

Guides related to this tool

Fall & Winter Reselling Strategy (2026): Q4 Playbook, Seasonal Categories, and Holiday Profit Systems

Seasonal Reselling Calendar: What to Sell Each Month in 2026

Micro-Local Demand Research for Resellers (2026): Neighborhood-Level Sourcing and Pricing Strategy