Just check coupons out (with price alert and history). What is best price?
Battery life Up to 80 hours, Tail diameter 35.5mm, Length 134mm, Lamp beads XML2, Lumens 800 lumens max, Material Aviation grade aluminum alloy, Longest range 332 meters, Battery 26650 (not included), Maximum luminous flux 18500cd, Head diameter 36.0mm, Waterproof standard 80 meters underwater, Brand SolarStorm, Lens High-transparency tempered lens, Weight 162g (without battery), Anti-drop height 1 meter
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($17.59): BGOutlight10
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGAlerabatI, FIN9790, F48284, BG61ad1d, BG8Alerabat, BGLED07
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for SolarStorm XML2 800lm 332m Diving Flashlight.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).