Beach Camera via Amazon offers the Able Planet Sound Clarity Over-The-Ear Active Noise-Canceling Headphones, model no. NC550BC, $34.95 with free shipping. (Best Buy sells them for the same. Non-members can spend $35 or more to qualify for free shipping; otherwise it adds $7.11.) That's $4 below our August mention and the lowest total price we've seen. (It's also a current price low by $15.) They feature active noise cancellation via two AAA batteries (included), LINX audio technology with remote and microphone, airplane adapter, and 20Hz to 20kHz frequency response.

Update: Note that this item won't be back in-stock at Amazon until December 20.