No worries, man. Ppl here seem to be slow in understanding.
So you have a pretty new account and after a quick search you don't have any reputation at all, so naturally ppl are careful and will aks a lot of questions. There are tons of scammer in this kind of business. Do you have receipts of the gift cards, the gift card itself or only the raw gift card code? People are more willing to buy if they get a photo of the gift card to ensure it wasn't bought digitally with a stolen credit card.