Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
Coupon (72.26 USD): BG10OFFAFF1
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): 724AFF, 4af39b, MHCNC65, 5c6c0b, M4BG, BRANDNC, 626b9c, 2880c7, BGAFF10OFF, BGCuponation10, 13f142, BGHONEY2110, BG10OFFAFF, BGwhielabel
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Nitecore HC65 Headlamp.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).