Rockwell Tools via eBay offers its Rockwell 12-volt Lithium Ion LED Flashlight, model no. RK2518, for $9.99 with free shipping. That's the lowest total price we could find by $10. This rubberized flashlight features a built-in stand, 49 lumens brightness, and up to 540 minutes of battery life.
Note that this is the flashlight only; the battery and charger are sold separately.