XP-L V6: 6500K-7000K, 1020 Lumens, 100-150m, 1x 16340 / CR123A / RCR123 battery (Not included), IPX-8 Standard Waterproof.
You can create price alert here, copy coupons and view price history. 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 code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($31.41): BGAlerabat15
2. ($31.41): BGtorch7
3. ($33.25): BGtorch2
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): NA78, ECFKL, MNFWA, AC19, BG13TH, BGM3, BGCL, BGTBD, BG1128, BGBFJ15, BGYW21, BG10OFFAFF1, BANGGOODSD, 6GSGIT, BGTorch4, 00c906, BGtorch3
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – On The Road M3 Pro XM-L2 5C 3800-4000K Flashlight ($-3)
Price history and price alert
Do you need price history chart (for all/most countries) for On The Road M3 Pro XP-L V6 6500K-7000K Flashlight? There we go. The lowest price was: $19.
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)).