Newegg offers the Sennheiser HD 439 Over-Ear Headphones for $49.95. Coupon code "EMCAPAP62" cuts it to $39.95. With free shipping, that's tied with our mention from January and the lowest total price we could find by $6. (Most retailers charge $67 or more. It's also tied with our mention from Black Friday.) They feature 4-foot and 10-foot detachable cables, 32-ohm impedance, and a 17Hz to 22.5kHz frequency response.