Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (38.95 USD): FINtc750
Coupon (47.67 USD): cbrIDgTec
Coupon (52.44 USD): BGTORCH
(CouponsFromChina.com tip: you should apply the coupon 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): BGTC750, linepayflt, FINTC500, BGBFCR41, FTC750
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for AMUTORCH TC750 6500K SST40 Flashlight? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).