There's no set amount. It's completely up to you and the seller. You can call or message the seller in the carsales app to work out how much the deposit will be.
Any information on this page is provided as a guide only. It is not professional or expert advice and is not a substitute for such advice. The content may not be appropriate, correct or sufficient for your circumstances and should not be relied on as the only reason you do or don’t do anything.