I think it's best if you visit a dealer. Baka iba iba requirements nila. Pero in general, pag bibilhin mo na sasakyan, you just need to pay stamp duty (around $40AUD ata). Insurance ikaw na din bibili and registration ikaw na din. Madali lang naman. Yung dealer na napagtanungan ko, optional ang warranty pag luma ang kotse.
Minsan lang ako nagtanong sa dealer, kasi gusto, magdecide ako bago test drive....kakatawa diba?haha
So I ended up doing my car hunting through Gumtree. But through Gumtree, there's a lot more risk, of course.
Here is an old but good video for buying second hand vehicle in SA:
https://www.youtube.com/watch?v=YVKTM2Bql7U
Hope it helps.