Groupon offers the Polk Audio Hinge Headphones with Remote and Mic in Black or Brown, model no. AM4119-A, for $29.99. Coupon code "SALE3" cuts it to $26.99. With $3.99 for shipping, that's $3 under our mention from two weeks ago and the lowest total price we've seen. (It's a current low by $4.) They feature a 10Hz to 21.5kHz frequency response, 107dB sensitivity, 32 ohms impedance, and 48" cable. Deal ends May 19.