Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
Coupon (15.18 USD): BGOutlight10
(CouponsFromChina.com tip: coupon code has to be applied in shop’s 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): BGCOSD, BGHONEY2110, cbrIDgTec, BGe50de4, BGaeff45, BG86b463, BGcef6c5, BGdeals86, BG10OFFAFF1, BGdeals104, BGYW65, BGYW71, BGTorch4, BGdeals226, 00c906, BGtorch2, BGtorch3, BGAlerabat15, BGtorch7, BGAlerabatI, BGtorch9, BG8Alerabat
(probably won’t work, but you can try them out)
Price history and price alert
Price history (for all/most countries) for XANES A516 800lm T6+COB Flashlight with Magnet is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).