Harman Audio offers the factory-refurbished AKG K490 Noise Cancelling On-Ear Headphones, model no. K490NC, for $174.99. Coupon code "K490DEAL" drops it to $98.88. With free shipping, that's tied with our June mention and $36 under the lowest total price we could find for a new pair. These closed-back headphones feature a 20Hz to 20kHz frequency response range, detachable cable, folding earcups, USB charging, flight adapter, and carrying case. A 1-year AKG warranty is provided. Deal ends August 23.