The Source has a sale going right now where you can get XBOX LIve Gold Memberships for $34.99 (regular $59.99). These are the Call of Duty: Blacks Ops II cards that have 12 month memberships to XBOX LIve Gold + an additional month for free. They also included a free Call of Duty avatar hat.

They also have the non Call of Duty cards as well for the same price (minus the avatar hat).

This offer is available in stores only.