World Wide Stereo offers the AKG by Harman K242 HD Semi-Open Headphones
for $166.95. Coupon code "SAVEAKG" knocks it to $99.99
. With free shipping
, that's the lowest total price we could find by $55. They feature a frequency response of 15Hz to 25kHz, 55 ohms impedance, and a 3.5mm gold-plated jack plug.