Here is an ozbargain list of the Mi 9T deals and I believe this is the cheapest so far.
The 128 GB version is also at its historical cheapest price of $440.8, link as below:
Great phone for the price, bought one for wife and another one for myself.
Consider it has no expandable storage, I would recommend going for 128 GB for less than $40 bucks more.
Oh, don't forget cashrewards to save you for further $5.6, making this phone (64GB version) a $393 phone!