i agree with the gents who have said you'll get better value for money buying a low km, recent year model, second hand car. I have just bought an 04 subi outback for less than you are talking and its fantastic.
best bits of advice i can give buying a secondhand car is
1- buy a japanese car, preferably, honda, toyota, subaru or nissan. they are so reliable and also hold their resale value better than many others.
2. get an RACQ pre purchase inspection done on any car you are seriously intrested in. they check hundreds of different points and can find mots of things that could be expensive later.
3. run the car you want to buy through this website (it costs money) they will tell you if its title is clear, if its stolen or if its been written off previously.
www.autocheck.com.au/?gclid=CObEjvO6vZkCFZgtpAod32gg5w