Here is the Link. Decent price as I don't see these on sale often. I hadn't noticed the Daily Deal Tab on GS.com until the last couple days. Maybe we will see some decent deals if they keep this up.
http://www.gamestop.com/xbox-360/accessories/xbox-360-rechargeable-battery-2-pack/98489
http://www.gamestop.com/xbox-360/accessories/xbox-360-rechargeable-battery-2-pack/98489