Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
Coupon (160.59 USD): BGTorch4
(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): BGSD07, BgoFErTaSchInA10, FIN2153, bGhOnEy10, BgcLuBofErtA10, BGFLS15, 4BLF, BGAFF10OFF, BGCuponation10, BGHONEY2110, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, 6GSGIT
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for SEEKNITE SD07 XPH70 Diving Flashlight.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).