Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. I don’t know if this is a good price – number of records in my database is too low! There is one great coupon!
Link: Banggood product page
Coupon (29.74 USD): BG123F2021
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply 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): BG2247c7
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
There is only one database record (it was for 27.99 USD), so you can’t see price history chart.
You can set price alert (for Banggood).