Diablo 2 Resurrected Pricing

Hi, a question in regards to the pricing in Australia for the Diablo 2 Resurrected, in the United States the pricing for PC and Nintendo switch of this game is $39.99 USD. However I have checked on my Nintendo switch and the game is $59.95 AUD and on PC it is $69.95 AUD. Why is there a difference in price, as I would like to buy the game first on PC and maybe in the future also have it on my switch, but why is there a price difference in Australia but not in US, I could not post this in the Diablo 2 forum as I do not own the game and have been told to post here?