Revere · Guide
Buying and selling a slab by its cert
Make an offer on a slab
- Look the slab up on revere.fi: type the grader and number from its label ("PSA 148617224"), paste the link from its QR code, or scan the label with your camera.
- If it says "not attested yet", press Attest it now. Revere's attester reads the slab's token from Courtyard and records on Polygon which cert it carries. It's free and takes about 20 seconds. Slabs that aren't tokenized (or are vaulted with Collector Crypt) can't take offers yet.
- Connect a wallet (MetaMask, Rabby, Coinbase Wallet, or any browser wallet; on a phone, open revere.fi in your wallet app's browser).
- Choose a price, how long the offer runs, and where your USDC comes from. From Polygon it's two quick transactions (approve, then offer). From Base, Arbitrum, Ethereum, OP or Avalanche, your USDC is burned there and minted on Polygon by Circle (CCTP); it takes roughly 15–20 minutes, and revere.fi delivers it to the escrow so you don't need POL.
- Wait. Your USDC sits in the escrow. The holder can accept at any time before it expires; you can cancel whenever you like and get it straight back; after expiry anyone can send it back to you.
When the holder accepts, the slab's token comes to your wallet and the USDC goes to them in the same transaction — or nothing moves. You then own the token like any Courtyard token: keep it vaulted, sell it, or redeem the physical slab through Courtyard.
Accept an offer on your slab
- See what's offered: look up your cert, or open Your slabs and paste your address.
- Your slab must be in a wallet you control. If you bought through Courtyard with an email login, the token sits in Courtyard's built-in wallet, which can only do what Courtyard's app offers. Move it to your own Polygon wallet first, using Courtyard's transfer/withdraw option on the card (see Courtyard's help for the current steps). The slab stays in Courtyard's vault; only the token moves.
- Have a little POL for gas on Polygon — well under a cent per transaction.
- Connect that wallet and press Accept on the offer. Your wallet asks you to send the token to the escrow; the escrow sends it straight on to the buyer and pays you the USDC in the same transaction. It refuses to settle for less than the price you were shown.
Questions
What does Revere charge? Nothing. No fee on offers, acceptance or attestation. You pay Polygon gas (fractions of a cent), and Circle's fee when funding from another chain (0 today at standard speed).
Who holds my money? The escrow contract, which has no owner, admin key, upgrade or pause. Nobody — including us — can move it except by the rules: acceptance, your cancel, or a refund after expiry.
What's an attestation? A signed statement on chain (Ethereum Attestation Service) that a cert is a particular custodian token. Revere's attesters only state what the token's own Courtyard metadata says. Anyone can run an attester; clients choose whom to trust.
Can someone offer on my slab without my knowing? Yes, and that's the point: an offer is addressed to the cert, not to you. Follow your cert with its RSS link, or check Your slabs. You're never obliged to accept.
What if the slab moves to another wallet? Offers follow the slab: whoever holds the token when they accept is the seller.
What if the slab is redeemed? Its token is burned, nobody can accept, and the buyer cancels or the offer expires and is refunded.
Is the price shown a valuation? No. "Other copies at this grade" is the median of recent sales of the same card at the same grade on tokenized venues (from slabbasis), not of this slab. It's context, not advice.
Which graders? PSA, CGC (and CSG), BGS, BVG, BCCG, SGC and TAG certs are understood. Settlement works where the slab is tokenized: Courtyard on Polygon today.