Lenovo offers its Lenovo W870 Bluetooth Wireless Headset in Black, model no. 0C53113, for $49.99. Coupon code "FLASHSALE113" cuts it to $20.99. With free shipping, that's tied with last week's mention as the lowest total price we've seen. (It's a current price low by $24.) It features a 360-degree microphone, foldable design, and Bluetooth.