I'd highly suggest staying away from this kind of thing. Putting aside the fact that it's explicitly disallowed to sell or barter a gift card as spelled out in the T&Cs of the program, we have seen many cases where this happens and I can't stress enough how many of them end up in fraud. I can't go into details obviously, nor can we ultimately prevent a private sale from happening, but I can promise you the buyer is almost always left holding the bag, as there is nothing we can do.