Be careful with this user, I've seen all his last messages and all he did was trying to scam people via trading.
accusations without proof show proof if you can or i will report you
Selling and buying a gift card is one of the most risky thing from an unknown source. Both the seller and buyer can get scammed. If someone buys the card from you use it and tell you it doesn't work, what are you going to do? You can't prove he has use it, ripping you of. Same aspect, in the opposite you could send him an used card and nobody can prove anything.
Wouldn't be easier for both parties to buy directly from
https://www.gyft.com/ , where you are going to get 5$ free when buying 15$ + points? And nobody has risk of getting scammed? It is just asking for troubles.