B&H Photo Video offers the AKG K 702 Open Headphones for $349. Coupon code "VELVET" cuts that to $149.99. With free shipping, that's the lowest price we could find by $56. They feature neodymium magnets, 10Hz to 39.8kHz frequency response, and detachable cable.
The dollar store is the most amazing place to find bargains for certain purchases. Yes, even pregnancy tests.