BuySonic offers the Beyerdynamic DTX 102 iE Earbud Headphones in Red for $39.99 plus $2 for shipping. (If you haven't already, you may need to create an account to see this deal.) That's $10 below our September mention and the best price we've seen. (It's also a current low by $17.) They feature a 9mm driver, 10 to 23kHz frequency response, 104 dB sensitivity, 23 Ohms impedance, and 3.9-foot cable.