World Wide Stereo offers the Able Planet Extreme Headphones in Red, model no. XNC230R, or Green, model no. XNC230G, for $37.94. Coupon code "CLEARANCE" cuts them to $22.49. With free shipping, that's $5 under our August mention and the lowest total price we've seen. These headphones feature active noise cancellation and a 20Hz to 20kHz frequency response; they require one AAA battery (included).