Newegg offers the Sennheiser HD 202-II Professional Headphones for $24.99. Coupon code "EMCWHHG47" cuts that to $14.99. With free shipping, that's a buck below last month's mention and the lowest total price we've seen. (It's a current low by $7.) These closed-back on-ear headphones feature a frequency response of 18Hz to 18kHz, removable ear cups, and a belt clip for adjustable cord length.