ResellOS is the inventory and crosslisting hub built by a card seller, for card sellers. Raw singles, slabs, sealed, show sales, and live breaks — one place, real profit numbers.
General crosslisters were built for clothes. ResellOS understands grades, cert numbers, comps, and selling at a table on a Saturday.
Create a listing once and push it to eBay, Mercari, and more. Photos, titles, and prices carry over.
Card sells on one site? It comes down everywhere else so you never sell the same slab twice.
Cost, fees, shipping, and grading baked in. See what you actually made — by card, channel, or month.
Track grader, grade, and cert number. Follow your grading submissions without checking five websites.
Ring up sales fast at a show or during a Whatnot or TikTok stream. Inventory updates on the spot.
Singles, sealed, consignment, and trades in one inventory — searchable from your phone at the table.
Every card seller hits the same walls.
Before: A card sells on eBay at 11pm and you forget it's still up on another site. Now you're refunding someone and eating a defect.
With ResellOS: It's delisted everywhere the moment it sells.
Before: A spreadsheet, a notes app, three seller dashboards, and no clue whether that show actually made money.
With ResellOS: One inventory and a profit number you can trust.
Beta testers get it free during testing and a locked-in founding price after. Takes 30 seconds.