Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. This is new product in my database, so I don’t know if this price is good. There is one coupon right now! Check this out.
Link: Banggood product page
Coupon (42.49 USD): BG123F2021
(CouponsFromChina.com tip: just apply this code 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): BGEEUTOOL1, BGHONEY2110, BGPower15off, 13f142, BG931bb3, BG123FBR
(these coupons are old, so probably won’t work)
Price history and price alert
There is only one database record (it was for 37.99 USD), so you can’t see price history chart.
You can set price alert (for Banggood).