No, the guy is "ruined" because that he doesn't realize that dealers are in the business to make money. What the little book says doesn't mean squat if the numbers don't match up to what the dealer paid for it. No dealer I know of is willing to sell something at a loss. That's not good business. If you really want to have a pleasant dealer experience, try this: Walk into the dealer and strike-up a conversation with the salesman. Let him (or her) know that you're serious about buying and you want to do the deal today. Then you say , "Look, I know you need to make a profit on this car, but I want a good deal too." Then ask them to pull the invoice and offer them invoice plus 3%. Seeing as most dealers make anywhere between 2% and 5% on a deal, chances are you'll be done with the paperwork and driving your new car home within an hour. The salesman will be freed-up to start working on another deal in a minimum amount of time and you have a new car. Everyone's happy.

Having worked at a dealer (motorcycles, not cars), I can say that nothing torques me off more than having some yahoo walk in off the street and expect me to sell him a bike at a loss because his little book says so. Not gonna happen.