See the Raspberry Pi Foundation buying guide. https://www.raspberrypi.org/products/ra ... -now-modal
There seem to be 2 local options that are cheaper than you have indicated.
Comparing those offers with equivalent recommended sources in the UK and applying a currency conversion chosen randomly via the Internet, the Au prices seem just a shade higher than the UK equivalent - perhaps 10%.
You would need to factor in the shipping cost and convenience before making a decision.
Remember that this display is pretty certain to work with your RPi and has the RPF name and experience behind it.
The blog post with the product announcement is here: https://www.raspberrypi.org/blog/the-ea ... i-display/
That was 30 months ago - the UK prices today look rather higher than the equivalent of 60 (us)$.