This is my first post on OzBargain :)
The review of the camera can be found at: https://www.dpreview.com/reviews/sony-a7rv-review
$4,499.10 is the lowest price in history for Sony A7R V.
If you pay with AmEx card, you will receive $100 cash back.
On top of that, you can request a price match from SONY AU website and wait for a 10-14% cashback from Cashrewards in the near future.
The final price would be around $3880, which is roughly the same as the RRP of A7IV.
I believe Sony has stopped paying cashrewards for pricematched items..
"It appears Sony has made the move to stop paying the Cashrewards discount on pricematched items. I have a 35 f1.4 in my cart and have been checking for a decent CR discount and just noticed this new clause.
Purchases using any type of discount which lowers price advertised on the Merchant site, including but not limited to employee discounts, student discounts and price-matching."
https://forums.whirlpool.net.au/thread/36rzm1z3?p=131