Amazon offers Prime members the Sennheiser MM 30i In-Ear Stereo Headset for $24.99 with free shipping. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $6.09.) That's $3 under our November mention and the lowest total price we've seen. (It's a current low by $5.) This in-ear headset features a 17Hz to 20kHz frequency response, music and volume controls, a microphone, and three different pairs of eartips.