BuyDig offers the Sennheiser Collapsible Noise-Canceling Headphones, model no. PXC 250-II, for $129. Coupon code "FOXSAY" cuts them to $89. With free shipping, that's the lowest total price we could find by $40. These over-the-ear stereo headphones feature a 10Hz to 21kHz frequency response and a 4.9-foot cable. One AAA battery (included) is required for noise-cancelling.