Meritline offers the MEElectronics Noise-Isolating In-Ear Earphones with Microphone in Black/Silver, model no. SX-31P-BK, for $7.99. Coupon code "MLCK525RNL1" cuts them to $4.49. With free shipping, that's the lowest total price we could find by $3, although we saw them for 50 cents less back in October. They feature 10mm neodymium drivers, a 20Hz to 20kHz frequency response, three sets of noise-isolating eartips, in-line microphone, and more.