Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (24.69 USD): 2022ACTIESNL
Coupon (24.96 USD): BG00c906
(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): 935bc1, BGITBICILED, 626b9c, BRANDXS, BGXXANES, BGAYOIZ, BGAFF10OFF, BGMUBB, BG10OFFAFF, BGwhielabel, BGBICYCLES, BG4d9120, 00c906, ADMITAD2212
(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 XANES STL-01 Induction Safety Bicycle Taillight.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).