Aliexpress
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
Coupon (168.00 USD): F98260
Coupon (169.95 USD): FIN1688
Coupon (222.23 USD): BGAlerabat15
Coupon (235.30 USD): BGtorch2
(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): BGflashlight, BGdeals34, BGdeals56, BGdeals80, BG10OFFAFF1, BANGGOODSD, 6GSGIT, BGTorch4, BGdeals327, 00c906, BGtorch3
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Price history (for all/most countries) for WildTrail WT90 SBT90.2 Flashlight is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).