Solid response from the dealer - "And know you know the REST of the story," as Paul Harvey used to say. It seems that the purchaser did in fact receive the benefit of his bargain and that Kevin doesn't owe him squat.
Going forward, I would only suggest Kevin follow up with Cary on the serial number provided by the purchaser, if for no other reason than to see if something did in fact go awry in terms of his company's tracking of inventory.
But other than that, this one done. Next.