TomTop offers these Wireless Bluetooth Rotatable Sports Sunglasses Headphones for $13.99. Coupon code "TTSH4" vuts it to $9.99. With free shipping, that's the lowest price we could find by a buck. Features include rotatable lenses, Bluetooth 4.1, and a wireless range of 33 feet.

Note: This item ships from China and may take three to six weeks to arrive. The countdown timer on the product page does not reflect an actual expiration time and resets daily.