LightInTheBox offers the Yage LED Rechargeable Headlamp for $6.99 with free shipping. That's $21 off and the lowest price we could find. It features two modes and IPX-4 waterproofing.
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.