Sonic Electronix offers its Sennheiser IE 80 Noise-Isolating In-Ear Headphones, model no. 504771, for $249.95. Coupon code "IE80199" cuts it to $199. With free shipping, that's the lowest price we could find by $50. They feature up to 26dB of noise isolation, frequency response of 10Hz to 20kHz, ergonomic eartips, two earhooks, carrying case, cleaning tool, and a cable clip.