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Underpriced AI

Apps and extensions

Get Underpriced AI where you sell

The phone app prices and lists what is in front of you. The browser extension fills in the same listing on other marketplaces from a computer. One account works in all of them.

On your phone

Take a photo at the shelf or the estate sale. You see what it sold for on eBay, what you keep after fees, and you can list it on eBay before you leave. Free to download for iPhone and Android.

Download on the App StoreGet it on Google Play
The app on a phone: a scan result with what the item sells for and what you keep on eBay

In your browser

The free extension takes an item you already priced and fills in its listing form on Facebook Marketplace, Poshmark, Mercari, Depop, Vinted and 7 more. You check it and press post. It runs in Chrome or Edge on a computer, and in Firefox on an Android phone.

Available in the Chrome Web StoreGet the Add-on for Firefox

Chrome on a phone runs no extensions. The iPhone and Android apps open the marketplace's form and fill it for you instead.

  • Facebook Marketplace
  • Poshmark
  • Mercari
  • Depop
  • Vinted
  • Whatnot
  • OfferUp
  • Etsy
  • Craigslist
  • District
  • 1stDibs
  • Ruby Lane
How the extension works

Nothing to install

It runs in any browser on a phone, tablet or computer. Your first scan is free and needs no card.

Try a free scan

Inside ChatGPT and Claude

Ask your assistant what something is worth and it answers from real eBay sold listings, through our connector.

Set up the connector