World Wide Stereo offers the Klipsch Reference S4 Premium In-Ear Noise-Isolating Headphones, model no. 1013730, for $79. Coupon code "61924" cuts them to $49.99. With free shipping, that's tied with our mention from last month and the lowest total price we could find by $23. Features include four different-sized ear tips, storage case, clothing clip, 10Hz to 19kHz frequency response, and more.