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What´s the currency exchange rate compared to USD or Euro?

because this seems very very expensive! I payed less than 30 Euro (almost = USD)

As of today, the exchange rates are roughly

AU$1.00 = US$0.70 = EU$0.60
AU$1.40 = US$1.00 = EU$0.85
AU$1.65 = US$1.15 = EU$1.00

Most new release PC games are $80-$90 here in any shop. We pay a lot for that sort of stuff. But I take heart in the fact that most other living expenses are cheaper.