Sawman,
If he is acting independantly then it may be difficult, but if he does it reguarly then I am sure one of the MCA members will have heard of him.
Usually used car brokers in Australia are licenced. so if you ask if they have a dealers/brokers licence you could check that way.
I have noticed that there are also a lot of scammers answering for sale ads now. They generally have an excuuse why they cannot get to see you before they buy and try to do deals through dodgy PayPal accounts.
My advice, is dont let anything go until you have the money in your bank, not a PayPal escrow account.
Good luck with the sale.
