Lenovo offers its Lenovo P950 Headset with Noise-Canceling Microphone, model no. 57Y6605, for $29.99. Coupon code "FLASHSALE605" cuts it to $8.99. With free shipping, that's tied with last month's mention as the lowest total price we've seen. (It's a current low by $4.) It features a noise-canceling microphone, 27mm drivers, and 125Hz to 20kHz frequency response.