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 (13.14 USD): BGSM30%
Coupon (13.14 USD): cbrIDgTec
Coupon (13.46 USD): fInbG2020
Coupon (13.96 USD): BGff2020
(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): BGYSD2, BGTORCH, BGASD2, BGF1111, BGMH20N
(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 Amutorch Yootoo SD2 SST20 Flashlight.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).