I have been researching used cars and found one that was just what I was looking for. For the last few days I have been emailing back and forth with the dealer about the car. When I went to the dealership to look at the car in person, the price had gone up almost $2,000 more. If I print the email out where I discussed the price and payment calculations with the internet salesman, can I hold them to the price they promised or am I out of luck?