BuyDig offers the Audio-Technica Noise-Canceling Headphones, model no. ATH-ANC27, for $44 with free shipping. That's $6 below our April mention and the lowest total price we've seen for these headphones. (It's a current price low by $25.) These headphones feature a frequency response of 20Hz to 20kHz, 40mm drivers, detachable cord, and carrying case.