In answer to the question.
Yes, it can.
Because it is!
A better phrasing would be "Can Raspberry Pi 3 Model B or Zero W be legally sold in Australia?"
The answer is still yes, we always get permission and relevant licences/conformity certificates prior to selling in a market.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Contrary to popular belief, humorous signatures are allowed. Here's an example...
“I think it’s wrong that only one company makes the game Monopoly.” – Steven Wright