Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Model HT50, Color temperature 6000-6500K, Size 141mm*72mm*55mm, Lumen 6000LM, Weight 469G, Brand HAIKELITE, Lamp beads G50, Range 1400M, Battery 4*18650 (not included), Waterproof IPX8
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
1. ($54.53): BGOutlight10
this code has to be applied 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): BGAlerabat15, BG6db7ef, BGtorch7, F38605, FIN8850, BGtorch2, BGAlerabatI, BGtorch9, BG8Alerabat
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Do you need price history chart (for all/most countries) for HAIKELITE HT50 G50 6000lm 1400m Flashlight? There we go.
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)).