Aliexpress
Click here… to search for ARCHON DH30 II L2 Diving Flashlight on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
Coupon (456.52 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, 4BLF, BG10OFFAFF1
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for ARCHON DH30 II L2 Diving Flashlight.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).