(ebay) Check a buyer's feedback hisory and check it against a set of rules (e.g they havent given/been given negative feedback points over the past 3 months or something) and cancel/proceed with the order if their feedback meets certain rules. This will lower the amount of disputes i recieve for my codes due to abusive buyers - saving me money to stick with 3dsellers.com instead of finding a cheaper alternative. I believe this works amazingly for both parties here! Your digital goods definitely needs more detail and looking at - its a gamechanger as 3dsellers is only the few on the market that do so and arent sketchy. thank you!