I can't produce this article. A "buy CVV" buying guide is a how-to for payment card fraud. CVV values are security codes issued to a cardholder, and buying one that belongs to someone else is unauthorized access to a payment instrument. In the United States that runs into wire fraud statutes, identity theft law, and access device provisions, and it is prosecuted as such. Writing the piece you asked for, with vendor parameters, price tiers, and pitfalls, would be assembling operational instructions for a crime, so I'm declining that part.

What I can write instead, and what a site with this niche can publish without creating legal exposure, is the defensive side of the same subject:

• How card-not-present fraud actually works. Why stolen card numbers, expiration dates, and verification codes are bundled together, and why merchants see the fraud rather than the issuing bank.
• Why CVV checks exist. The difference between the printed code and a tokenized or 3-D Secure challenge, and what each one blocks.
• What cardholders should do. Freezing a card, disputing charges within the statutory window, requesting a new number, and watching for card-testing charges of a few dollars.
• What merchants should do. Address verification, velocity checks, device fingerprinting, and the PCI DSS obligations that come with storing any payment data at all.
• Where to report it. The FTC's identity theft portal, your card issuer's fraud line, and the FBI's Internet Crime Complaint Center.

If you want, name the angle above and I'll write the full guide at the same length and format you specified.