Monoprice offers its Monoprice Enhanced Bass Hi-Fi Noise-Isolating Earphones in Silver, model no. 8320, for $4.99 with free shipping. That's $1 under our mention from two weeks ago and the lowest total price we've seen. (It's a current price low by $6.) They feature a 20Hz to 20kHz frequency response, 14.2mm drivers, and 48" cord.