Harman Audio offers the factory-refurbished AKG K 840 Headphones in Black, model no K840KL, for $254.99. Coupon code "149K840" cuts the price to $148.95. With free shipping, that's a buck below last summer's mention and $81 under the lowest total price we could find for a new unit today. They feature AKG's Kleer technology, allowing 16-bit playback over a 2.4Ghz radio link, a frequency response of 10.5Hz to 31kHz, and up to 28 hours of playtime on a full charge. A 1-year Harman warranty applies. Deal ends April 12.