Halo: Reach multiplayer beta, you've decided to stock up on a few Xbox 360 peripherals on the side. Amazon should be able to satisfy most of your needs on the cheap, thanks to the "MS Gearfest Promo" the online retailer is running until May 1.
Thanks to the promotion, wireless controllers have been marked down to $27.99, HDMI AV cables are $19.99, and wireless microphones go for $29.99. We're not sure why you'd be picking up extra wireless microphones in anticipation of Reach, though. Perhaps you need extra blunt objects to bludgeon your exasperating, teabagging friends?