World Wide Stereo offers the Klipsch Reference S4i In-Ear Noise-Isolating Headphones with Microphone in Black, model no. 1013731, for $97.97. Coupon code "WTB3Y54" cuts them to $67.50. With free shipping, that's the lowest total price we could find by $52. These earbuds feature a frequency response of 10Hz to 19kHz, 3-button mic and remote, home theater-style cables, four different-sized ear tips, carrying case, and more.