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 (12.56 USD): BGSM30%
Coupon (12.56 USD): cbrIDgTec
Coupon (12.87 USD): fInbG2020
Coupon (13.34 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): BGSD1, BGTORCH, BGF1111
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for Amutorch YOOTOO SD1 SST20 Flashlight? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).