As one of its daily deals, THAT Daily Deal offers this 9-LED Shotgun Shell Flashlight for $4.99 with free shipping. That's $5 off and the lowest total price we could find, outside of the below mention. Batteries are included. Deal ends October 31.
Note: This flashlight ships in a random color.
A close price: Amazon has it for less at $4.16 with free shipping via Prime, but a purchase of $25 or more is required.