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Tap Add Card on your collection. You can look up a PSA cert number to pull official details automatically, enter the card by hand, or import a whole spreadsheet via CSV.

Use CSV Import to bring an existing spreadsheet collection into Grails. Map your columns once and every card is created with its purchase price and value.

Select a card and choose Marketplace Selling to create a listing. Interested buyers contact you through the in-app messaging system. You agree the price and the payment between you. The marketplace is a Premium feature; the subscription is all you pay, and no commission comes out of the sale.

The marketplace — buying, selling and messaging — is part of the Premium subscription. Browsing the listings is free. On a sale we take nothing at all — not a percentage, not a listing fee, nothing when it sells. The price you agree is the price you get. The money goes straight between the two of you. The flat subscription is what funds the site.

You're handing money to someone you've never met. There's no escrow here and no buyer protection, so the care is on both of you. Keep the conversation in the app. Never pay by gift card or crypto — that's how people get robbed, and once it's gone it's gone. Be wary of a rush, and of a price too good for the card. Read the reviews. Our server writes them after a sale completes, so nobody can post their own. If something feels wrong, there's a report button on the listing, the profile and the conversation.

Your 7-day Premium trial converts to the Free plan automatically if you do not upgrade — no charge and no card required to start.

Export your full collection to CSV whenever you like. Your data stays private and you can leave at any time.

Enter a PSA certification number and Grails fetches the official card name, set, year and grade, then adds the card to your collection.

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