Cheapest i have seen it. No instruments but seen a few deals around here for the rock band 1 set.
* Requires a drum, microphone or guitar controller to play
* Rock Band instruments sold separately
* The best band game on the market just got better thanks to a slate of innovative features from Harmonix, the preeminent music game studio! Take your band on an online-enabled World Tour mode, record albums, tackle the addictive Set Challenges, or even compete against other bands, either in your living room or halfway across the world, in the Battle Of The Bands mode... plus all of the modes you know and love from the first Rock Band game!
* Innovative hardware updates! Rock Band 2 will ship with 2nd generation hardware: more durable, wireless drums with an expansion port to support cymbal pads and improved wireless Fender Stratocaster guitars - with multiple colours - that will let you rock harder and longer then ever before.
* Rock Never Dies! Compatible with all past and future downloadable content - even tracks you downloaded for Rock Band back in 2007 - so you can play a never-ending, face-melting set.
* Learn to play drums! Rock Band 2 pushes music simulation farther than it's ever gone with a tool that actually teaches you how to play the drums in real-life - or you can just have fun jamming and playing along to songs like an animal in the Freestyle Drum mode.