Adorama offers the Ultrasone Pro 550 Over-Ear Closed-Back Professional Headphones for an in-cart price of $109.99. This $20 mail-in rebate drops it to $89.99. With free shipping, that's $5 under our mention from two weeks ago and the lowest total price we've seen. (It's the best price we could find today by $31.) These foldable, circumaural headphones feature 50mm Mylar drivers, a 10Hz to 22kHz frequency response, S-Logic natural surround sound, gold-plated connectors, 10-foot coiled and straight detachable cables, extra earpads, and hard carrying case. Deal ends November 2.