Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (43.69 USD): BGAlerabatI
Coupon (44.68 USD): BGtorch2
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): BGEDC18, BG18, cbrIDgTec, BG13TH, BGF1111, fInbG2020, BGff2020, BGSM30%, BGTBD, BG14TH24, BGflashlight, BG10OFFAFF1, BANGGOODSD, BGTorch4, BGdeals323, 00c906, BGtorch3, BGAlerabat15, BGtorch7
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for LUMINTOP EDC18 Flashlight.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).