This is the all-time lowest price of this game according to ITAD.
This is the sequel to the highly praised Pillars of Eternity which itself is the spiritual successor to the cult Baldur's Gate games.
If you buy this, be prepared to invest a significant amount of time. ;-)
Enjoy.
Note: An alternative to the above, albeit at a slightly higher price is to buy the game at Fanatical ($39.49 AUD):
https://www.fanatical.com/en/game/pillars-of-eternity-ii-dea…
The fanatical price is valid until 3 December 3:00am.
If you have no issues with Grey market sites, CDKeys has it from $17.79 AU: https://www.cdkeys.com/pc/games/pillars-of-eternity-ii-2-dea…