Aliexpress
Here are coupons that you can use.
Latest price update (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!
Link: Banggood product page
Coupon (589.99 USD): BGFDD3SCZ
Coupon (589.99 USD): BGD3SMS
Coupon (594.99 USD): D3S2021
(CouponsFromChina.com tip: coupon code has to be applied in shop’s 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): BGFDD3SEU, PICODICOM, issamFDD3SEU, BGFDD3SEU19, BGFDD3SEU11, BGFDD3SEUB5, BGFDD3SEUXM, bGpAnDacHeCk, 7bcdf9, EUBGFDD3S78, ISSAMEUFDD3S78, BG9AD3S, BGFDD3SBDS, BGEBSC15
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
There is only one database record (it was for 589.99 USD), so you can’t see price history chart.
You can set price alert (for Banggood).