LightInTheBox offers the Doosl Mini Wireless Presentation Remote Control in Black for $7.99 with free shipping. That's the lowest price we could find by $6. It features a 330-foot wireless range and works with Windows, Mac, Linux, and Android.
Note: This item ships from China and may take two to five weeks to arrive. Uncheck "Add Shipping Insurance to your order" during checkout to remove the 49-cent fee.