As one of its daily deals, Newegg offers the Sennheiser HD 518 Over-The-Ear Audiophile Headphones for $49.95 with free shipping. That's tied with our mention from last month as the lowest total price we've seen. (It's the best deal today by $10.) These open-back headphones feature a frequency response of 14Hz to 26KHz, Duofol diaphragms, and 10-foot cord.