GoGamer is having a monster sale on the Guitar Hero: World Tour Bundle for the Wii and Xbox 360. Right now you can get the full setup which includes guitar, drums, mic and game for $99. That's a savings of $100!
PlayStation 3 owners aren't completely left completely out in the cold as they can get the standalone game for $29.99.
Please use the above links when ordering to support Co-Optimus.com. It should be noted that shipping is $44 - which still saves you $50.