Where abouts in Adelaide are you hun? The RSPCA have a shelter in Lonsdale and AWL is in the Pt Adelaide area. We paid around $200 for our 2.5 year old dog, but pups are closer to $300, from the RSPCA.

Included the price was:
Microchipping
Desexing
Vaccinations
Worming

have a look on adoptapet for RSPCA shelters, there might be another one that I don't know about.