TigerDirect offers the Ultra Carbon 2.0 Noise-Isolating Earbuds, model no. U12-41499, for $20. This $20 mail-in rebate cuts it to $0. With free shipping, that's the lowest total price we could find by $27. They feature an in-line microphone, 20 to 20kHz frequency range, 9mm drivers, and three sizes of ear tips. Rebate ends February 1.