Honestly how much are you expecting to get? It's really risky to sell GCs for BTC. If you want to receive a high percentage go to raise.com or any of those Gift Card sites.
Why would I sell you gift cards when selling gift cards yourself, seems to me your jut trying to lowball me to resell it...
https://bitcointalk.org/index.php?topic=639039.msg7140963#msg7140963