Newegg offers the Sennheiser HD 518 Over-The-Ear Audiophile Headphones for an in-cart price of $79.99. Coupon code "EMCAKKT57" cuts that to $69.99. With free shipping, that's the lowest total price we could find by $9, although most stores charge $130 or more. These open-back headphones feature a frequency response of 14Hz to 26KHz, Duofol diaphragms, and 10-foot cord. Deal ends January 22.