gnome668 via eBay offers the
UltraFire Cree XM-L T6 6,000-Lumen LED Flashlight for
$3.49 with
free shipping. (
pongpong2016 via eBay charges a few cents more.) That's the lowest price we could find by $2. It features an adjustable focus and waterproof design. Three AAA batteries are required but not included.
Note: This ships from China and may take up to nine weeks to arrive.