A marketplace for trading-card collectors that can set up trades between three or more people.
Collectors catalog their cards, see what their collection is worth, and buy, sell or trade, either in person or by mail. If two people can't swap directly, GrailSwap looks through everyone's want lists for a loop where each collector ends up with a card they want.
- Chain trades: finds trades between three or more collectors using their want lists
- Scan a stack: AI identifies cards from the camera for you to confirm
- Vault: condition, grading (PSA, BGS, CGC) and value for every card
- Buy safely: payment is held in escrow until both sides confirm the deal

