Underpriced.App
Snap a find and see its resale value, fees and your profit before you buy.
A startup from Mississauga, Canada, founded by Alex.
Snap a find and see its resale value, fees and your profit before you buy.
A startup from Mississauga, Canada, founded by Alex.
This page is designed to help you find out whether Underpriced.App is good and if it is the right choice for you.
Underpriced is a resale profit checker for thrift flippers and online resellers. It helps you decide what to buy before you pay.
How it works: snap a photo, scan a barcode or upload a listing screenshot. We identify the item, check recent sold listings on eBay (plus Poshmark and Mercari when available) and current eBay listings, take off selling fees and shipping, and show what you'd keep with a flip or pass call.
Free checks show the estimate, fees, profit, current listings and how many recent sales we found. Paid plans add the sold prices, 3 photos per check, batch mode, due diligence checks, Authenticity Check, Negotiator and multi-platform listing drafts.
Pricing: 5 free checks, no card. Reseller $9.99/month (75 checks), Pro $14.99 (200), Ultra $24.99 (500). First month half price, 20% off yearly.
Works on the web, iPhone, Android, Chrome and Firefox. It doesn't crosslist or give appraisals.
More at www.underpriced.app
Listed in
Net profit after fees
Actual take-home after eBay, Mercari, Poshmark, or FB fees so you don't get surprised.
ROI calculator
Return on every item with filters for minimum ROI when you're sourcing fast.
Velocity & time-to-sell
Average days to sell so you know which buys free up capital fastest.
Market value signals
Range, confidence, and data points. When the band is tight, you can trust the number.
Flip Tracker
Inventory, costs, and real P&L in one place. Add straight from an analysis.
15-second workflow
Optimized for mobile and in-store sourcing. Snap, analyze, decide.
Deep Dive
Extra context, risks, and what to verify before you spend a dollar.
Negotiator
Ready-to-send messages and leverage points to shave the price down.
Plan My Flip
Listing strategy, pricing band, and what to optimize for a fast sale.
eBay Comps
Comparable listings with trimmed stats to sanity-check every valuation.
Underpriced.App is built for one thing: helping you spot underpriced items fast and confidently. Instead of guessing from a single listing photo or a seller’s description, it focuses on market-backed signals (comps, pricing patterns, and profit context) so you can decide “buy / pass / offer” in seconds. It’s designed around real reseller workflows—Facebook Marketplace and local deals, quick checks on the go, and repeatable decision-making—without turning it into a bloated spreadsheet app.
Most alternatives either (1) give generic “estimated value” numbers with little context, or (2) require a lot of manual searching and interpretation. Underpriced.App is streamlined for speed and clarity: it’s meant to reduce hesitation and prevent overpaying by surfacing the right signals at the right time, then turning those into an actionable recommendation. It’s also built to scale with you—from casual thrifters doing occasional flips to serious resellers who need consistent, repeatable results.
Underpriced.App is for deal-hunters and resellers who want to make smarter buying decisions: people who browse Facebook Marketplace, thrift stores, garage sales, liquidation, and retail arbitrage opportunities and need a quick way to validate price and profit potential. The core audience is practical and time-constrained—buyers who don’t want to do 10 tabs of research for every item, but still want decisions backed by real market behavior.
Underpriced.App comes from a simple pain point: flipping and deal-finding isn’t hard because there are no deals—it’s hard because it’s easy to overpay, miss red flags, or waste time doing research that doesn’t translate into a clear decision. The app was created to make that moment of uncertainty disappear by turning “Is this actually a deal?” into a quick, repeatable process grounded in comps and market reality.
Underpriced.App is a modern web-first product with mobile support: React + Vite for the UI, Tailwind CSS for styling, Capacitor for mobile app packaging, Firebase (Auth + Firestore) for user/accounts and data, and Vercel serverless functions for API endpoints and integrations (like billing and webhooks). It’s optimized for fast iteration and reliable deployment while keeping performance strong.
Full-time resellers running consistent daily sourcing Part-time flippers who source on weekends and evenings Facebook Marketplace buyers trying to avoid overpaying Thrift and garage-sale shoppers who want quick price validation Retail arbitrage beginners learning what’s actually profitable Small resale operations scaling from “side hustle” to steady revenue
Seems to be the best app for resellers and thrifting. Great for analyzing profit and tracking inventory.
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Check the traffic stats of Underpriced.App on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of Underpriced.App on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of Underpriced.App's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of Underpriced.App on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
The latest comments about Underpriced.App on Reddit. This can help you find out how popualr the product is and what people think about it.
• What would actually make you open an app like this mid-thrift-store-aisle? Ios AppStore: https://apps.apple.com/us/app/underpriced/id6759008101 Thanks for reading, happy to answer any questions about the build! - Source: Hacker News / 8 months ago
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