Newegg offers the factory-refurbished Sony DREX12IP Stereo Headset in Black for $10. This $10 mail-in rebate cuts it to $0. With free shipping, that ties our mention from last July as the best deal we've seen for these headphones. (It's also $21 under the lowest total price we could find for a new pair.) They feature a frequency response of 18Hz to 22kHz, in-line microphone, and controls. Rebate expires February 28. A 90-day Sony warranty applies.