Required by law in Victoria if you are selling a vehicle. There’s more information on this page
Because of the law mentioned above you shouldn’t need to get a pre-purchase inspection done because the seller should have got one and it should be displayed with the vehicle.
Safety and Peace of Mind
This is especially relevant if you are planning a long trip soon, perhaps a family holiday.
Warranty Expiration Inspection
You might like to get your car inspected just before your warranty expires to make sure everything is in working order.