Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
CREE XP – E2 R2, 168 Lumens, Waterproof: IPX-6 Standard Waterproof, Body Material: ABS, Available Light Color: Neutral White, Red, White
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. Coupons for Revtronic HL3A Headlamp? Nope, there’re no coupons in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Price history and price alert
Check out price history chart (for all/most countries) for Revtronic HL3A Headlamp.
Price records source(s): Gearbest, 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)).