Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
1x 26650 Lithium-ion Battery, 1x Waterproof Rubber Cap, 1x Hand Rope, Package Contents: 1x Flashlight, 1x Flashlight Sleeve, 1x Type-C Charging Cable, 1x English Manual, 2x Waterproof O-ring
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. I couldn’t find any coupon for this product on latest product update.
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
Old coupons (from the oldest to the newest): 502C6B, linepayflt, EYBG, BGTORCH, BGBFCR41, bGhOnEy10, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, BGFLS15, 4BLF, BGAFF10OFF, BGCuponation10, BG10OFFAFF, BGwhielabel, BGflashlight, BG10OFFAFF1, BANGGOODSD, BGTorch4, 00c906, BGtorch2, BGtorch3, BGAlerabat15, BGtorch7
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for MHVAST TS70 5700K-6500K Flashlight.
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)).