Adorama offers the Sennheiser HD 650 On-Ear Headphones for $290 with free shipping. (Amazon charges the same.) That's tied with our January mention as the lowest total price we've seen. (It's a current low by $39.) Features include a 10Hz to 39.5kHz frequency response, 300 ohm impedance, detachable cable, aluminum voice coils, and titanium finish.