Amazon Warehouse via Amazon offers the used Sennheiser HD 598 Over-the-Ear Headphones in Black for $68.22 with free shipping. That's $79 under the lowest total price we could find for a new pair and the best price we've seen for these headphones in any condition. (For further comparison, we saw a new pair for $27 more in November.) They feature a 12Hz to 39kHz frequency response, 10-foot cord, velour ear pads, leatherette headband, and burl wood accents.

Note: They may have minor cosmetic imperfections.