Rock Band 3 PS3 Wireless Pro Guitar - $35 + FS (Amazon), Wireless PS3 Keyboard - $25 + FS (Amazon), PS3 MIDI Pro Adapter - $14 (Amazon), Band Hero PS3 Band Kit - $40 + SH (TM)

So I'm a pretty big Rock Band fan and have been looking for any good deals during Christmas season and have found quite a bunch...all of these are the lowest or near the lowest they've ever been (according to camelcamelcamel and camelegg).

NOW $35.00 WAS $43.40 - Rock Band 3 Wireless Fender Mustang PRO-Guitar Controller
http://www.amazon.com/Wireless-Mustang-PRO-Guitar-Controller-PlayStation-3/dp/B003RS1A7Y/ref=sr_1_1?ie=UTF8&qid=1355544166&sr=8-1&keywords=rock+band+3+pro+guitar - shipped and sold by Amazon.

- Only PS3 version. Camelcamelcamel says it's only been cheaper during Black Friday week (don't see a post on it though). Picked one up for myself...seems like a good deal. Edit: At $35, this is the cheapest this has ever been.

- Just to be clear, this is the PRO GUITAR made for Rock Band 3 only. It emulates a real guitar, it can be used to hook up to a computer or other device to transmit MIDI data as well (if you wanted to make your own music for example). Mad Catz is the official creator for all of Rock Band accessories.

NOW $52 WAS $49 - Mad Catz Rock Band 3 PRO-Guitar Bundle ? Includes: Red Hot Chili Peppers Bonus Tracks, Full Game, and Fender Mustang PRO-Guitar Controller for Xbox 360

http://www.amazon.com/Catz-Rock-B...ock+band+3 - from a third party seller fulfilled by Amazon.

- Not interested in it myself as I don't own a 360, but it resembles a front page deal for $48 http://slickdeals.net/permadeal/79830, figured someone would appreciate it.

DEAD $40 - Band Hero: Band Kit (PS3)

OOS http://www.newegg.com/Product/Pro...6879221183 on Newegg for $40 + FS.
PS3 Version still available as of 12/24: http://slickdeals.net/f/5706380-B...To-Ship-It at Tuesday Morning for $40 + SHIPPING

- Only the PS3 version is still in stock. This set previously went for $25 a month ago, but is back in stock for $40. Still an insane deal considering you get: the game, drums, a guitar, and a microphone for $40 shipped...ordered a set for my nieces and their family.
- Thanks to LuncheonMeat, added his Tuesday Morning thread; TM has the 360 version in stock; have to pay shipping, but you may be able to find it in store

NOW $24.99 WAS $26.38 - Wireless Keyboard for Rock Band 3 (PS3)
http://www.amazon.com/Rock-Band-W...s+Keyboard shipped and sold by Amazon for $26.38.

- Cheapest it's ever been has been $25.

NOW $13.59 WAS $15.58 - Mad Catz Rock Band 3 Midi PRO-Adapter
http://www.amazon.com/PlayStation...ro+adapter

- It's been a couple bucks cheaper, but these were rare for quite a long time and $40+ to boot. These allow you to hook up any *other* MIDI instrument for use in Rockband 3 (drums, guitar, keyboard). Xbox version is available too.

- You can actually use any *USB* instrument as well. I wrote up a blog post on this a long time ago on my website:http://www.ndolger.com/configurin...ck-band-3/. It's kind of complicated, but it can be done...

Hope that helps!