Grabbed the deal last time from Goodguys and found this to be the lowest at the moment:
https://www.thegoodguyscommercial.com.au/denon-72-ch-8k-av-r…
Also AVRX580BTBKEA is $482 + Delivery if you are going to set up a 5.2 channel system:
https://www.thegoodguyscommercial.com.au/denon-52ch-home-the…