You can get BL03 Bike Headlight for 35.99 USD with coupon (from Banggood). Basically copy coupon, view price history or create e-mail price alert. Best price?
Latest coupon and price update (UTC):
Banggood (35.99 USD)
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update. Isn’t it too expensive? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal 31.83 USD)
Link: Banggood product page
Price: 35.99 USD
Old coupons (from the oldest to the newest): FIN4421, BGOutlight10, BG589b2e, BG8FORMULAMX, BGcharles03
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
Click here… to search for Astrolux BL03 Bike Headlight with Taillight on Aliexpress
Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for Astrolux BL03 Bike Headlight with Taillight? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).