Aliexpress
Click here… to search for NITECORE P10I Flashlight SST-40-W on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
Coupon (103.11 USD): BANGGOODSD
(CouponsFromChina.com tip: you should apply the coupon 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): BG10OFFAFF, BGwhielabel, BGflashlight, BG10OFFAFF1
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for NITECORE P10I Flashlight SST-40-W is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).