It's even better here... the local version costs A$90, and the US version costs US$60... both digital downloads from battle.net. Why is it so much more expensive here when the game is probably bit-for-bit identical anyway, there's no translation costs or distribution costs or anything? Because fuck you, that's why.
I believe the primary reason is that the battle.net servers are more costly to run in Australia.
Other than that, it does seem rather highly priced.