Pitbull Audio via eBay offers the Audio-Technica ATH-M50x Professional Studio Monitor Headphones in Black for $99.99 with free shipping. That's the lowest total price we could find by $19, although we saw them for a buck less last week. They feature a 15Hz to 28kHz frequency response, 45mm neodymium drivers, swivel earcups, padded headband, and three detachable cables.