Just check coupons out (with price alert and history). What is the best price?
Body Color: Blue / Green, Impact Resistant 1.5 Meters, Max Output: 2400 Lumens, Tactical Ring Black, Range: 875 Meters, Battery: One 26650 cell (or a 21700/18650 cell), Weight: Approximately 295g without cells, Emitter Type: SST40-W, 5000K More yellow than Neutral white, 5700K Neutral white, Peak Beam Intensity: 190, Waterproof: Equivalent to IPX7, Light temperature: 6500K Cool white, 26650 battery included., do not immerse in liquids, 000 CD
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.
Link: Banggood product page
1. ($48.18): BGASTROLUX
2. ($48.18): BG10OFFAFF
3. ($48.71): 4BLF
apply it in your 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): BG03BC, BGTORCH, AXMAS, BGAST25, BGAFF10OFF, BGCuponation10
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for Black Ring Astrolux FT03 SST40-W Flashlight With 26650 Battery.
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)).