Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (30.80 USD): tRaDetRaCKeR
Coupon (31.14 USD): 2203ActiesNL
Coupon (31.47 USD): BG00c906
(CouponsFromChina.com tip: apply it 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): BGAFF10OFF, BGHYHA, BGCuponation10, 13f142, BGHONEY2110, cbrIDgTec, BGBICYCLES, FIN6021, BG10OFFAFF1, BG4d9120, 00c906, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, BG1efeb0, 8Couponsde, MVC8SPRING, 8BGwbg2204
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for WUBEN H3 Headlight.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).