I'm unsure about the facts of this case but i put down a deposit, got the car inspected by a workshop, flew over to brisbane for a car
I'd sure be @#$%^&*() pissed if he sold it before i arrived and i'll definately get something out of him if he did.
If he agreeded via email to this "buyer" that he would hold it for him then his definately expected to hold onto it until it gets inspected
you dont have to sign an contract to enter into an agreement, your actions can be considered as intent
however i do agree with others that this buyer is fictional