The official Transformers page on the Hasbro website has recently been updated with some character bios and artwork, and it has been filtered into various country pages, including the Australian page here.
Even though most of the 14 bios and art posted so far are for wave 1 toys, one is a wave 2 toy (Sludge) and one is a wave 3 toy (Optimus Primal). (art and bios mirrored here, when it eventually disappears from the Hasbro site)

The Australian product page has also included the first wave of POTP toys, with Australian RRP (emphasis on "Recommended", as Australian retailers only have to worry about competitor prices... legally they can not be forced or pressured into prices that are recommended by suppliers).

As such, the approximate expected prices in Australia for POTP toys in Australia, are...
Prime Masters - $10
Legends - $20
Deluxe - $35
Voyager - $50
Leader - (not listed yet)

This compares to American RRP of US$25 for Voyager, US$17 for Deluxe, US$10 for Legends, and US$5 for Prime Masters. (Leaders not listed yet)
So basically, their prices are half of ours, while the exchange rate is at about 75-80 us cents, which allows for fans here to import from America for less than full retail here.... especially if there aren't any sales on at the time, or they don't show up at the cheaper retailers like Kmart and BigW.

On the Australian "where to buy" page, they include Harvey Norman... which means that they must have been selling something Transformers related - maybe the Remote Controlled Sqweeks, or DVDs, because they aren't a regular toy retailer.