Cowboom offers the used Beats by Dre Wireless Studio Headphones in Black, model no. 900-00198-01, for $179.99. Coupon code "BEATS7215" drops them to $139.99. With free shipping, that's $129 under the lowest total price we could find for a new pair. They feature the Beats Acoustic Engine, DSP software, adaptive noise cancellation, and a 30-foot range. No warranty information is provided.

Note: No warranty information is provided. This used unit may have dents or scratche.