Today only, newegg offers the Sennheiser CX 200 Earbud Stereo Headphones, model no. 502544, for $39.99. Coupon code "SENNH1017" cuts them to $17.99. With free shipping, that's tied with our July mention and the lowest total price we could find by $5. (Amazon charges the same for Prime members.) Features include a 3.5mm plug, noise isolation, frequency response of 20Hz to 20kHz, and more.