As one of its daily deals, Woot offers the Sennheiser MM 400-X Bluetooth Headphones for $129.99 plus $5 for shipping. That's the lowest total price we could find by $32, although most merchants charge $270. These folding headphones feature a 15Hz to 22kHz frequency response, omnidirectional microphone, Bluetooth 2.1 + EDR, and up to 10 hours of listening time. Deal ends today.