Sonic Electronix via eBay offers the Fostex TH-500RP Premium RP Stereo Headphones for $329 with free shipping. That's $20 under our December mention and the lowest total price we've seen. (It's a current best by $140.) These well-reviewed open-back circumaural headphones feature planar magnetic copper foil diaphragms, aluminum cups, leather earpads, gold-plated plug, and a 20Hz to 30kHz frequency response.