When I bought the 2001 Prius new, I was also considering late-90s used Civics and Corollas. The latter would have cost much less to purchase, but I was strongly influenced by pollutant emissions. If this is an important factor for you, then the search for Australian info on pollution ratings must begin. I only know the sources of USA info.

There are specific internet groups for Australian hybrid drivers; I could mention those if desired. One important issue is going to be obtaining qualified service. You won't need it very often but when you do, it is not a good vehicle to "learn" upon.

DAS