Lenovo offers its Lenovo W870 Bluetooth Wireless Headset in Black, model no. 0C53113, for $49.99. Coupon code "USP1JU543113" cuts it to $19.99. With free shipping, that's tied with our June mention as the lowest total price we've seen. (They're a current low by $29.) They feature a 360-degree microphone, foldable design, and Bluetooth. Coupon expires September 24.