Get this Xbox 360 Wireless Headset for just $29. it also ships free. I know that I paid more than that for the one I bought my son. It was close to $50.
Let the fun go to your head with an Xbox 360® Wireless Headset. Roam free as you chat with friends on Xbox LIVE or team up and jump in with online multiplayer game-play. You and three friends can connect controllers and headsets to your console and challenge other teams wherever they are. *Xbox LIVE Gold membership required for online multiplayer.