Amazing Deals Online via Amazon offers the Audio-Technica Professional Studio Monitor Headphones, model no. ATH-M30x, for $69. Coupon code "ATH20OFF" cuts the price to $55.20. With free shipping, that's the lowest total price we could find by $14. They feature 15Hz to 22kHz frequency response, 40mm drivers with neodymium magnets, 96 dB sensitivity, and a collapsible design.

Also available are the Audio-Technica Professional Studio Monitor Headphones, model no. ATH-M40x, for $99 before the coupon above, $79.20 after. With free shipping, that's the lowest total price we could find by $20. Compared to the model above, they feature 15Hz to 24kHz frequency response, detachable cable, and 90-degree swiveling ear-cups.