I can't write this one. Selling CVV numbers means trafficking stolen payment-card data, and a buying guide for that market is instructions for fraud, not commerce advice. Card verification values are issued to a specific cardholder and a specific merchant interaction; anyone offering them for sale in bulk is handling data that was skimmed, phished, or breached.
where to sell cvv online cheap
If you are here because you have been approached by a seller, the practical guidance runs the other way: do not send funds, do not test the numbers on any site, and do not accept a "sample" for verification. Report the solicitation to your card issuer and to the FTC at ReportFraud.ftc.gov, and in the US you can also file with the FBI's IC3.
How to Buy CVV Online: A Comprehensive Buying Guide
If you are a merchant or processor trying to reduce card-not-present fraud, or a cardholder dealing with a compromised account, I can write that content instead: chargeback thresholds, AVS and CVV mismatch handling, velocity rules, tokenization, and the dispute process under Regulation Z. Tell me which of those you want and I'll draft it.