Basically copy coupon, view price history or create e-mail price alert. What is the best price?
, Head Diameter: 41mm, SST-40 version: 2000lm@7.5A, IPX-7(1meter/3.28ft depth), BLF D80v2, BISTRO OTSM User Interface, 153grams(without battery), SST-40 N4 DD 4.700-5.000K, Tail Diameter: 28mm, XP-L HI version: 1500lm@5.5A., XPL-HI V2 3B 5.000–5.200K., Length: 132mm
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($30.54): cbrIDgTec
2. ($34.36): BGTORCH
you should apply the coupon 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): 502C6B, BGBFCR41
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for WildTrail BLF D80v2 SST40/XPL-HI 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)).