Aliexpress
Click here… to search for Xiaomi Mi Mix 2S 6/64GB Black [HK] on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: 369.99 USD.
You can set price alert (for Banggood).