Buy.com has a Plantronics .Audio 365 Stereo Headset for $9.99 (Orig. $44.95). Shipping is free.
Description: Consider the Plantronics .Audio 365 headset indispensable gaming equipment. Rugged and durable, it’s built to last, just like Plantronics products used by NASA and the military. A closed-ear design and 50mm speakers deliver resonant stereo and booming bass to immerse you in the game. You won’t just hear it, you’ll feel it. A lightweight, adjustable headband with foam ear cushions delivers superior comfort, game after game. And for team gaming, the high-quality microphone reduces distracting background noise so people can easily hear you. Adjust volume or mute the microphone with just a touch. This is the headset for serious gaming.