amazon has
Amazon.com: Rock Band 3: Xbox 360: Video Games for $29.96 + Free super saver shipping
the wii version is also for the same price
Product Features
Platform: Xbox 360 | Edition: Game
RB3 has great new party modes for quick rocking sessions with friends, as well as a whole new universe of challenges including a revamped Career Mode and 700+ goals and rewards
Game track list contains over 80 of the best bands from around the world, including bands that have never appeared in a music game, and support for existing Rock Band tracks
Create and save set lists, and share them with your friends online and enjoy improved song sorting makes it easier to find the songs you like
Expand the band with the optional keyboard peripheral and 3-part vocals harmonies, together allowing support for up to 7 players
Take your passion for music to the next level with Rock Band Pro functionality that lets you develop real musical instrument skills through gameplay
Rock Band 3 for wii or Xbox 360 $30 + FS 
