Cree XM-L2 U2, 1000 lm, 6600cd, 4000-5000K, Battery Quantity: 1x 18650 or 2x CR123, IPX-8 Waterproof Standard, Beam Distance: 100-200m, Beam Angle: 100 degree, Package Contents: 1x Nitecore HC30 LED Headlamp, 1x Headband, 1x O-ring, 1x Switch Cover, 1x Clip.
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. 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
1. ($46.96): cbrIDgTec
2. ($46.96): m4x2020
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): MNC03, 365fb8, CFNKL, CFCBG
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for Nitecore HC30 NW Headlamp. The lowest price was: $35.99.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).