Aliexpress
Click here… to search for SEEKNITE B50 L2 XPG2 Headlamp on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
Coupon (26.90 USD): 00c906
(CouponsFromChina.com tip: apply code in your basket (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): BG10OFFAFF1, BG39d4fc, FSNKT21, BGc12dbf, BG4d9120
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for SEEKNITE B50 L2 XPG2 Headlamp.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).