You can now snag the Rock Band Drums (Xbox 360 and PS3) for $48.99 ($79.99 list) with free shipping at Amazon. 

Check it out:

• Amazon - Rock Band Drum Set

Product Description
The Rock Band Drum Kit allows players to unleash the power of rock-and-roll drumming " featuring four durable drum pads, a kick pedal, drum stand, and authentic wooden sticks. Use the Rock Band Drum Kit to upgrade to a full band, play head-to-head or versus mode with your friends (online enabled with Xbox 360 software), or play through solo tour mode on your own.