Kristin, be SURE to reply to the comments using the reply link below each comment. Otherwise, the person who commented never knows you replied, and if you don't reply to comments when selling a high-value item like this, you won't get many bids.
I can only bid if you can promise you'll send me the code on the card as soon as the auction ends. You don't need to send the card in the mail ... since people can only buy on Amazon online anyway, the code is all they need.