Why does it have to be in SA?
I live in SA too but flew to Sydney to get a car a few years ago, then flew to Melbourne the end of last year to get my latest one.
Cost me $600 for the car, flight was about $70 and about $250 fuel to get that car from Syd back to Adelaide, could have easily sold it for $2,000+ back here right away.
The latest one (VT) cost me $1700, about $100 for the flight and another $100 for fuel. Could have sold that back here for $4,000+ straight away, saved $2,000-3,000 if I was to buy the same in SA.
Still if you want to get the first one no one is stopping you, but still for $5,500 and given a few months I could buy 2-3 low km VTs with that money.
You could even get a VY for that much, or a VZ for a extra $500.