TechMatte via Amazon offers Prime members its TechMatte Qi Wireless Charging Pad for $10.99 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.07.) That's tied with our September mention, $29 off list, and the lowest total price we could find. It includes a USB cable (no adapter is included).

Update: The price has increased to $12.99.