Newegg offers the open-box Philips Over-Ear Open-Back Headphones, model no. SHP9500S, for $37.99 with free shipping. That's $30 under the best deal we could find for a new pair and the lowest total price we've seen in any condition. (They're $12 below our mention of a new pair from three weeks ago.) They feature an impedance of 32 ohms, 50mm neodymium drivers, and frequency response of 12Hz to 35kHz.