At Monoprice, search for "8320" to find the Enhanced Bass Hi-Fi Noise-Isolating Earphones in Silver, model no. 8320, for $6.43 plus $1.99 for shipping. That's the lowest total price we could find by $4, although we saw them for $4 less in February. They feature a 20Hz to 20kHz frequency response, 14.2mm drivers, 48" cord, and more.

Not a fan of shiny things? From the pull-down color menu, select Black, model no. 9927, for $7.57 plus $1.99 for shipping. (Pink, model no. 9960, and White, model no. 9963, can also be found in the pull-down menu for this price, although they're currently backordered with an expected arrival date of April 25.)