The Camera Box via Rakuten offers the Audio-Technica ATH-M50x Professional Studio Monitor Headphones in Black for $169. Coupon code "X049BYU" cuts the price to $114. With free shipping, that's the lowest total price we could find by $38 in any color, although we saw them in white for $15 less last month. They feature a 15Hz to 28kHz frequency response, 45mm neodymium drivers, swivel earcups, padded headband, and three detachable cables.
Of note, you can apply coupon code "REWARDME" to bag a 570 Rakuten Credit. (It converts to a $5.70 credit.)