Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
Coupon (38.66 USD): BANGGOODSD
(CouponsFromChina.com tip: apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGCM2, 502C6B, ZCM2, e2bcea, linepayflt, EYBG, BGTORCH, BGBFCR41, BGCONV, BGCONVOYSS, BGFLS15, BGAFF10OFF, BGflashlight, BG10OFFAFF1
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for Convoy M2 XP-L HI Flashlight 6500K.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).