[crainholio]

If he signed a contract when he made the original order, that contract is binding on both parties.

Had the guy changed his mind, the dealership could have dragged him into court.

From what you've said, the dealership changed it's mind and has attempted to alter the terms of the contract.

If he can produce a signed document, and pay an attorney for ~ 1/2 hour of work, the car's probably his at the originally-agreed price.