The $1 card marketplace
Swipe through hundreds of sports cards, each priced at exactly $1. Add to your box, check out once, and ship it all together. No auctions. No bidding wars. Just great cards.
How cardboard.stack works
Built for collectors who want to grow their collection without growing their spending.
Browse & swipe
Flip through the card deck. Swipe right to stash, left to pass. Find exactly what you're looking for.
Build your box
Every card you stash goes into your box. Mix cards from different sellers — we bundle it all.
Check out once
Pay for your whole box in a single order. $1 per card, plus one flat shipping fee.
Cards at your door
Your stack ships together. Open the box and add to your collection.
No auctions. No guessing. $1, always.
Every card on cardboard.stack is listed at exactly $1. No watch lists, no sniping, no price anchoring. Sellers set condition and details — buyers swipe and stack.
It's designed for the casual collector who wants to fill set needs, snag low-pop base cards, or just discover something new — without spending hours on an auction site.
Moving your binder?
List cards in seconds. Our AI reads the photo and fills in the details — you just set condition, upload, and wait for orders.
Snap a photo
Take a front (and optional back) photo of each card. Batch upload up to 100 at once.
AI fills it in
Claude vision reads the card and suggests player, year, set, and sport. You review and confirm.
Orders roll in
Your cards go live at $1 each. Buyers swipe and stash — you fulfill when they check out.
Stack your collection.
Hundreds of $1 cards, ready to browse. Join free and start collecting — or list your own.