BuyDig via eBay offers the AblePlanet Musician's Choice Noise Canceling Headphones in Black, model no. NC180B, for $14.99 with free shipping. That's $5 below our mention from last month and the lowest total price we've seen for these headphones. (It's a current low by $55.) They feature a 20-20kHz frequency response, folding design, and detachable cord.
From shoes to cookware, if you're willing to pay a little more for these awesome products, you may never have to shop for another again.