Truck buying experience

I spoke with a dealer in Iowa last Thursday about buying a truck told him I wanted the truck even offered to send him a deposit; he assured me the truck wasn't going anywhere that a deposit wouldn't be necessary. I told him I would be out there Wednesday of this week to pick it up. I called him today to let him know I would be there on Wednesday and he tells me that someone else is on their way to get the truck as we speak. Talk about making me angry, I would have been there today if I knew he wasn't good for his word.