Just check coupons out (with price alert and history). What is the best price?
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):
U6-3A 5000-5200K, 1100 Lumens, 150 Meters, 1x 18650 Li-ion battery (Both protected or unprotected) (Not included), IPX8 waterproof
Banggood
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 724AFF, SCC8, CMBB, CFCBG, cbrIDgTec, MYN8C, M4BG, MZGKM, F7BG, BGCC8, BGF1111, BGBF19, BGNYSPPQ, fInbG2020, BGff2020, 0e7f33, m4x2020, BGSM30%, BGCONVOYSS, BGTBD, BG1128, BGflashlight, BGCONV, BG10OFFAFF1, BANGGOODSD, 6GSGIT, BGTorch4, 00c906, BGtorch2, BGtorch3
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Other warehouses/versions
This item is available in 4 another warehouse/versions!
1. China – Convoy C8+ Flashlight U6-4C 4200-4500K Black ($-3)
2. China – Convoy C8+ Flashlight V2-1A 6000-6500K Black ($-3)
3. China – Convoy C8+ Flashlight U4-7A 3000-3300K Black ($-3)
4. Europe – Convoy C8+ Flashlight Black [EU] ($-3)
Price history and price alert
Do you need price history chart (for all/most countries) for Convoy C8+ Flashlight U6-3A 5000-5200K Black? There we go.
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)).