Plantronics Voyager 835 Bluetooth Headset for $19.99 shipped.  Here is a screenshot for your reference.  Alternatively, it is available here for $24.99 shipped.  This Bluetooth headset features dual-mic AudioIQ noise-cancellation, WindSmart, and more.  Note that it comes in OEM packaging, which means no pretty retail box and marketing materials but is otherwise identical.  It usually goes for quite a bit more.