XP-G3: 6000-7000K, 53960 CD, 12000 Lumens (XP-G3) (tested with 4×18650), 450 Meters (Max.), 2x 18650 or 4x 18650 battery (not included), IPX-7 waterproof.
You can create price alert here, copy coupons and view price history. You probably want to know what is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($87.96): m4x2020
2. ($87.96): BGTBD
3. ($87.96): BGSM30%
4. ($90.16): BG1128
5. ($98.95): BGASTROLUX
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BGMF01, AC18, CFCBG, BGXFK, BGAMF01, ac18, MMF01, M4BG, F7BG, BGF1111, BGBFCR40, BGBF19, BGX656, AXMAS, fInbG2020, BGff2020, BGAST25
(these codes were not working in latest coupon update, but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Astrolux MF01 219C Flashlight ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for Astrolux MF01 XP-G3 Flashlight. The lowest price was: $69.
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)).