Short answer
I won't write a walkthrough for buying or selling stolen card data, whether the payment is bitcoin or anything else. That isn't a formatting preference. Selling CVVs is trafficking in stolen financial credentials, and a guide that explains marketplaces, escrow, or vendor vetting is a manual for a felony. What I can do is explain what that world actually is, because the honest version is less glamorous than the sales pitch, and it's more useful to know.
What "CVV selling" really is
A CVV is the three or four digit code on a payment card. In card-not-present transactions, that code plus the card number and expiry is often all a merchant needs. So the underground trade in CVVs is really a trade in stolen card numbers, usually dumped in bulk after a breach or skimmed at a terminal. Bulk dumps are sold cheap because most of the cards inside are already dead, cancelled by the issuer or drained by someone faster. The buyers who make money are running an operation, not shopping.
Who absorbs the loss
Cardholders deal with the chargeback paperwork. Merchants eat the fraud and the chargeback fees, and small shops often eat it twice. Issuers raise everyone's costs. And the people moving the money through crypto rails have no recourse when a vendor takes the coin and vanishes, which happens constantly. The marketplace itself is the most common scam in the marketplace.
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The legal reality
In the United States, trafficking in stolen access devices falls under 18 U.S.C. § 1029. Penalties scale with the amount and the scheme, and a single case can carry years in federal prison plus restitution. Prosecutors don't need to catch you mid-transaction. Possession of the data with intent, plus the chat logs and wallet records, is usually enough. Crypto is not anonymous the way people assume. Chain analysis has been used in these cases for years.
Beginner Guide Dark Web CVV Shop
What to look up instead
If the interest is how fraud works, read the FTC's consumer and business guidance on payment card fraud, or the FBI's public reporting on carding and credential theft. If you're a merchant, look into address verification, 3D Secure, and velocity checks. If a card of yours was exposed, freeze it and pull your credit reports. Those are the useful directions, and none of them require a darknet vendor.