Assuming you want to buy new, and want to get it in the next week or so...
Target has some deals with gift cards when you buy a console and some games coming up.
Quote:
Hardware Deals
160GB Playstation 3 - $249.99 w/ $50 Gift Card
4GB Xbox 360 Bundle - $199.99 w/ $50 Gift Card
Call of Duty: MW3 Xbox 360 Bundle - $399.99 w/ $50 Gift Card
Game Deals
The Elder Scrolls V: Skyrim (PS3, Xbox 360, PC) - $59.99 w/ $10 Gift Card
LEGO Harry Potter: Years 5-7 (PS3, Xbox 360, Wii) - $49.99 w/ $10 Gift Card
LEGO Harry Potter: Years 5-7 (3DS) - $39.99 w/ $10 Gift Card
LEGO Harry Potter: Years 5-7 (PC, DS) - $29.99 w/ $10 Gift Card
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Otherwise, keep an eye on
http://www.cheapassgamer.com/ for deals throughout the Holidays.