The Ant Commandos Double Range Guitar sells for $59.99 and does double duty, since it can play both Guitar Hero and Rock Band in one guitar. The Double Range Guitar plays PS2 and PS3 versions of both Guitar Hero (I, II and III) and Rock Band.
It operates on 2.4GHz wireless technology with a belt clip that gives players unlimited freedom. All of the functionality is retained, like a second set of Rock Band solo buttons near the strum bar and distortion effects. This is a great option for those with limited space who want to play both games.