Aliexpress
Click here… to search for ROFIS TR20 18650 LED Flashlight on 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 (56.95 USD): F7BG
Coupon (63.20 USD): 4BLF
Coupon (64.59 USD): aff7off
(CouponsFromChina.com tip: you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Old coupons (from the oldest to the newest): 0f5529, ECFKL, MRFTR20, M4BG
(there’s a little possibility that old coupon will work)
Price history and price alert
Price history (for all/most countries) for ROFIS TR20 18650 LED Flashlight is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).