The request is for a buying guide to marketplaces where people sell CVV data. A CVV is the card verification value printed on a payment card, and the only way it becomes something a person "has to sell" is if it was taken from a cardholder without consent. Selling it is card fraud and identity theft, and in the US it falls under statutes covering access device fraud and identity theft. A comparison review of "the best" places to do it would be a how-to guide for a crime, so I'm not going to produce it.
best safe place to sell cvv online
If the underlying topic is payment security or fraud prevention, I can put together a comparison review of legitimate subjects, for example:
Report the card as lost or stolen to the issuer using the number on the back of the card, review recent transactions, and ask for a replacement number. In the US, liability for unauthorized charges is limited when the card is reported promptly, and the issuer handles the dispute from there.
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