That is interesting, because it differs quite markedly from what Apple is telling me. Below is a quote from a support email in answering this question when put to Apple:
"The developer can set the price to anything they like in each country that the App is on sale. The developer has selected the AUS$ price not Apple. I have received numerous requests or reports about the same issue and most of our customers have commented on similar pricing discrepancies between Australia and US. Often there are tax and import regulations that make prices different on top of differential pricing based on what the market will bear."
So, is it simply a case of blaming each other? Why can't we buy from an overseas app store? What,
actually, is the story?