I can't help with this request. CVV dumps are stolen payment card records, and buying, selling, or helping someone find a seller for them is card fraud under 18 U.S.C. § 1029 and comparable laws in most countries. A guide explaining where to buy them, how to vet a vendor, or what to watch out for would function as operational assistance to that crime, so I won't produce it.
If your actual goal is something adjacent and lawful, I can write about it. Useful alternatives:
CVV Dump Shop: What It Is and Federal Penalties
Tell me which of those you want and I'll write the full piece.
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