Westone Audio via Amazon offers it Westone UM Pro30 Triple-Driver Universal In-Earphones in Clear for $269.99 with free shipping. (B&H Photo Video and several other stores charge the same.) That's the lowest price we could find by $130 and the lowest price we've seen. They feature three balanced armatures, 3-way crossover, detachable cable, and frequency response of 20Hz to 18kHz.