Blinq offers the open-box Sennheiser HD 598 Cs Closed-Back Headphones in Black for $106.89. Coupon code SENN20OFF
drops it to $85.51 with free shipping. These around-ear headphones feature a 10Hz to 28kHz frequency response, 23-ohm impedance, and 2 detachable cables (9.9-foot and 3.9-foot with 1-button remote).
Note: No warranty information is available, but the vendor does offer a 30-day return policy.