Hmm, no offense but I am just thinking that maybe you will used a hacked credit card to purchase those? And if that's the case, you may face some problems regarding your trades. Tell me, how would your service work? I've seen a lot of them before, one of them being purse.io. Also, you're a newbie, and as always, no one will trust a newbie on handling such trades unless the user already built some reputation around the forum.

How do we know the credit cards are yours and not stolen? Weren't there sites like this before, I think bitsumo comes to mind.

I am willing to go the extra mile to make my buyers feel at ease, all I need to know is what that is.
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It will be my name on every single credit card purchase, and it will be my credit card used for every purchase/payment. I am willing to do whatever is needed to prove that is the case. I also do not mind sending a statement that I take full responsibility for the payment method authorized for the purchase, or anything else that might make you feel more at ease.