This might not be much of a deal for some (which might explain why I didn't see it posted yet), but Buy.com
has the 3-month Gold card for XBL for $11.99 with free shipping.
Be sure to pick the shipping type with the longest delivery time before confirming your order to ensure you get the free shipping; when I placed my order, the default shipping speed added about $5 to my total, so be careful about which one is selected.
EDIT: The link no longer works and the card is listed at $18.99 w/ free shipping, so this deal is dead and a mod can remove this topic.
Edited by Vigilante, 30 July 2012 - 08:39 PM.
Currently Playing: Pokemon Y; Theatrhythm Final Fantasy: Curtain Call Bloodborne; The Walking Dead S1 Ratchet & Clank HD Senran Kagura: Bon Appetit!; Shovel Knight
Last Beaten/Completed Game [4/29]: XBlaze Code: Embryo (4.5/5)
"Moreso than the good, it is the evil who must be rescued." -Shigesato Itoi
So the moral of the story is Vig is awesome; all glory to the master flipper.