Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. Uhm… There’s no price history (in my database) for this product right now.
Link: Banggood product page
Coupon (41.85 USD): Cuponation9
Coupon (41.85 USD): 9OFFSUMMER
Coupon (42.31 USD): hoNEYbGdeAlS
Coupon (43.23 USD): BG00c906
(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): MVC8SPRING, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN
(there’s a little possibility that old coupon will work)
Price history and price alert
Well, you won’t see price history chart, coz we have only 1 database record for this item (and price was 37.99 USD).
You can set price alert (for Banggood).