Amazon offers the Sennheiser Momentum On-Ear Headphones in Black, Blue, or Brown for $99.95 with free shipping. (Sonic Electronix charges the same and includes a $10 store gift card.) That's $50 under our mention from three days ago and the lowest total price we've seen for these headphones. (It's also a current price low by $20.) Features include a 110db sensitivity, 16Hz to 22kHz frequency response, 18-ohm impedance, iPhone-compatible cable with remote and microphone, and include a hard carrying case. Deal ends December 1.