Also something hard to ignore was the chargeback, even after proposal of going through increments. And I was going to propose escrow but I dont it`ll help.
What about using escrow?
Amazon codes has a high chance of being chargebacked as well. Can you prove that you have done many amazon deals and haven't chargebacked? The 10 deals with anonymous22 don't prove much either seeing as they can go sour. I think he actually had negative feedback at one point from selling carded starbucks vouchers too.
Because the escrow would have to be a minimum of 10 days before release. Only because you wont know when they do the chargeback.
Escrow wont stop chargebacks and they can probably happen several months later, but it will ensure you actually get the card. Many of these scammers don't even have the cards they're trying to sell and will just run off with your money once they get it.