LightInTheBox offers the QCY QY19 Bluetooth Sport Earbuds in Black for $13.99 with free shipping. (Be sure to choose "free shipping" at checkout.) That's the lowest price we could find by a buck. They feature in-line controls and a 20Hz to 22kHz frequency response.

Note: This item ships from China and may take two to three weeks to arrive. Uncheck "Add Shipping Insurance to your order" during checkout to remove the 69-cent fee.