Svmgiftcards has a few cards on sale. I have used their gas cards for well over two years now (over $1200 spent with them), and others here I am sure can attest to their reliability. Cards usually arrive in a week.
I searched the forums and didnt see any posts for all of the gascards combined, so I included links to all of them so that people on both sides of the country could find cards which may benefit them.
ExxonMobil $100 giftcard for $93
BP $100 giftcard for $93
ChevronTexaco $100 giftcard for $94
They also have Barnes and Noble, Meijer, and other cards for cheap.