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Latest coupon and price update (UTC):
5.99 inch MIUI 8 Snapdragon 835 2.45GHz Octa Core 6GB RAM 256GB ROM Fingerprint Scanner 12.0MP Rear Camera
Price history and price alert
Price history (for all/most countries) for Xiaomi Mi Mix 2 6/256GB Black is here.
Price records source(s): Gearbest
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You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).