Today only, Woot.com is offering the Philips VOX340/17 A2DP Stereo Bluetooth headphones for $18 including shipping. The headset offers earbud-style headphones as well as a microphone for use with calls. The device will work as a standard A2DP adapter, and also includes an adapter for use on non-Bluetooth music playing devices.

Woot.com
Update: Sold out.