At 2 million bucks a pop, they won't be selling too many into Australia. An operator wishing to move with the times and stay competitive in the corporate sector could source two decent used King Airs for not much more money than that.
But what is it going to cost to keep those King Airs operational. The King Air still uses systems that came from the Queen Air age. Also unless you know exactly what you're buying, second hand turbo props can be a bit spendy, especially to start with.
At least with a new aircraft you have some surety on what you're getting, unless it has unproven technology.