The Antler Convoy

Ventures

Browser extension for Chrome and Edge

FlipComp

See what a Facebook Marketplace item sells for on eBay, right on the listing: the median sold price, your profit after fees, and a Great, Good or Pass score.

Coming soon to Chrome and Edge
A Facebook Marketplace listing for a Dyson vacuum at $40, with the FlipComp card showing a $130 median eBay sold price, an estimated profit of $46.91 and a Great Deal score.
A $40 vacuum that sells for about $130 on eBay: a great deal.

How it works

One click on any listing

The numbers that matter

Click "Check eBay sold prices" and in a few seconds FlipComp shows the median sold price, the typical range, how many have sold, your profit after eBay fees and shipping, and the highest price that's still a good deal.

Vague titles, handled

Marketplace titles like "PS5 stuff" or "Dewalt tools" are turned into a clean eBay search by AI that reads the title, the description and, when needed, the photo. Fixing the search doesn't use another lookup.

Honest comps

It leaves out partial matches, sales marked for parts, best-offer sales where eBay hides the price paid, and prices far from the rest. Every fee, shipping cost and deal threshold can be changed in Settings.

Private

It only reads Marketplace listing pages, never profiles or messages. eBay pages load in your own browser, and there are no ads, no tracking and no selling of data.

Plans

Free for the occasional flip

Free $0

  • 5 lookups a day
  • Reopening a listing you already checked is free for 24 hours

Pro $7.99/month or $59.99/year

  • Unlimited lookups (fair use of 100 a day)
  • A history of your last 500 lookups, with a CSV download
  • Saved eBay searches you can check again with one click
  • Automatic checks when you open a listing
You'll need an eBay account: since July 2026 eBay only shows sold listings to signed-in members, so sign in to eBay once in the same browser. Sold prices come from eBay.com (United States).
FlipComp on a $200 MacBook Air listing, scored Pass: a typical eBay sale of $129.99, minus eBay fees, shipping and the $200 price, is a $100 loss.
It tells you when to pass, too: this one would lose $100.

FlipComp is not affiliated with or endorsed by eBay Inc. or Meta Platforms, Inc. eBay is a trademark of eBay Inc. Facebook is a trademark of Meta Platforms, Inc. Payments are handled by ExtensionPay, with cards processed by Stripe.