Price history, coupons and price alert are available on this page. You probably want to know what is the best price?
Lens: Filmed Mineral Glass, Low, Tail Cap Paddle Switches, Emitter Type: XHP35 LED, High, Body Finish: Premium Black Type-III Hard-Anodized Anti-Abrasive Finish, Medium, Charging Method: USB Charging, Housing: 1.00 in. / 25.4 mm, Carrying Strap: Lanyard, Battery Configurations: , Weight: 3.7 oz./ 106 g (excluding battery), Material: Aluminum Alloy, Ultralow, Switch Location: Side Switch, Mode: Turbo, Head: 1.16 in. / 29.5 mm, Length: 5.6 in. / 143 mm, Waterproof: IPX-8, 1x 3.7V 18650 Li-ion/2x 3V CR123A Lithium Primary (not included), Range: 279 meter, 800 Lumens, Reflector: Precision Metal Filmed, Color: Black, Strobe, Light Output: Max 1, & Tail Cap Center Switch, Impact Resistant: 2 meter, Size: , Model: MR20
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
1. ($46.62): BG10OFFAFF1
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGMR20, ZMR20, 502C6B, BGB70, EYBG, BGSM30%, bgsm30%, BGTORCH, BGSPR, BG1128
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Price history (for all/most countries) for FITORCH MR20 Flashlight is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).