There is some lack of parity with some items, but many scopes/mounts are competitively priced here.
Curiously, Celestron products were overpriced a few years back, much more competitive now.
By "competitive" I mean more or less the same once you've paid shipping and import taxes to get it here from overseas by yourself. And of course, shipping to here for anything much larger than a pencil sharpener can be pricey
The current AU$ exchange rate doesn't make the situation any more palatable though.