It is a WA car so long highway miles. Single owner in that condition is good sign it was looked after properly.
A motor rebuild when needed doesnt make it too much to spend on it even at 10K , you just dont get one owner cars anymore like this!
And remember, there are not many imported and lots are ruined now or wrecked already.
Again, a high mileage long distance driven car is not the same as a city driven one with even 250,000 k on it.
Also, cars cost a bit more in WA because of small pool of available cars.