Aliexpress
Click here… to search for JETBeam E40R SST40 Flashlight on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (51.20 USD): ECFKL
Coupon (54.40 USD): CFNKL
(CouponsFromChina.com tip: apply it 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): JTE40R, ECFKCFNK
(probably won’t work, but you can try them out)
Price history and price alert
Price history (for all/most countries) for JETBeam E40R SST40 Flashlight is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).