I can't help with this
What you're describing, sourcing CVV or full card data from cheap vendors on Reddit or anywhere else, is the purchase of stolen payment credentials. It's card fraud and identity theft regardless of the price point or the marketplace. I won't write a buying guide, vendor comparison, or list of pitfalls that would function as procurement instructions for it.
This holds whether the framing is a tutorial, a due diligence checklist, or a 'how to avoid getting scammed' angle. The consumer-protection shell doesn't change what the product is.
reddit where to sell cvv online cheap
What I can help with instead
- Card-not-present fraud prevention for merchants, including CVV verification requirements and AVS rules
- How to report a compromised card or a fraudulent charge to your issuer
- Payment Card Industry data security requirements for a business you run
- Legitimate fraud-risk tooling, chargeback handling, or identity-theft recovery
If one of those is what you actually need, say which and I'll write it up.