As one of its daily deals, Woot offers the Sennheiser MM 100 Stereo Bluetooth Wireless Headset in Black/Gray for $79.99 plus $5 for shipping. That's tied with our mention from two weeks ago and the lowest total price we could find by $25. (Most retailers charge $129 or more.) Features include a 22Hz to 20kHz frequency response, neckband, and up to nine hours of talk time. Deal ends today.