As one of its daily deals, World Wide Stereo via Sears offers the Klipsch Reference S4 Premium In-Ear Noise-Isolating Headphones, model no. 1013730, for $37.99 with free shipping. That's the lowest total price we could find now by $4, although we saw them for a buck less last week (since expired). Sales tax is added where applicable. Features include four different-sized ear tips, storage case, 10Hz to 19kHz frequency response, and more. Deal ends today.