Harman Audio offers the factory-refurbished AKG K545 Closed-Back Headphones, model no. K545BLK, for $174.99. Coupon code "129K545BLK" drops it to $129.95. With free shipping, that's $120 under the lowest total price we could find for a new pair. They feature a foldable design, 50mm drivers, carrying case, frequency response of 10Hz to 25kHz, and two detachable cables with inline controls. A 1-year Harman warranty applies. Deal ends April 5.