BuyDig offers the Sennheiser HD419 Over-the-Ear Headphones for $29 with free shipping. (Amazon charges the same, but with sales tax in more locations.) That's the lowest total price we could find by $9, although it was $4 less two weeks ago. These headphones feature a 20Hz to 20kHz frequency response, 108dB sensitivity, 4-foot cable, and more.