I can show you how to trade risk free. See my other thread in goods.
How can you stop someone from charging back their credit card? AMEX will charge back anything with no questions asked. And if your answer is seller protection from paypal there is a limit per year for seller protection and they don't like paying it out over and over again. Eventually they will cut you off.
I use secondary markets. I don't deal directly with the buyer, buyer pays someone else who gives me a non-reversible digital item that I sell again back to someone trusted with no loss in value.
Wow, what a run on sentence.
Basically, chargebacks are not my problem. You can chargeback, you're ripping someone else off except me.