Harman Audio again offers its factory-refurbished Harman Kardon CL Precision On-Ear Headphones in Black/Silver, model no. HARKAR-CL-Z, for $139.99. Coupon code "49HKCL" cuts it to $49. With free shipping, that's tied with last month's mention as the best price we've seen. (It's also $26 under the lowest price we could find for a new set today.) These folding headphones feature a 16Hz to 20kHz frequency response, leather earpads, detachable cable, three-button remote, and microphone. A 1-year Harman Kardon warranty applies. Deal ends March 29.