If you don't feel like dropping 180 large on the swanky new Rock Band 2 instruments and bundle, perhaps a $99 (Wii, PS2) or $119 (360, PS3) price tag suits you better? Online retailer Amazon.com has dropped the prices on these bundles which includes the Guitar, Microphone, Drums and a copy of Rock Band 1; which of course is fully importable into your Rock Band 2 experience on the 360 and PS3.
All told you could have Rock Band 1, all the instruments and Rock Band 2 for less than the full price of the Rock Band 2 bundle. Score!