Bob,
I too like the Modial and one day plan on getting that or a GT4 for my future wife (just recently engaged). For the purchase, whether individual or dealer, I guess you just have to feel comfortable with who you are dealing with and if you feel the car is being accuratly disclosed.
For my Ferrari, I wanted a 308 GTS. I spent 6 months trying to find the right car. My limitation was distance (and price), I wanted to get a car in the northeast US so I could drive down with the trailer and come home in one day. I didn't find too many individuals selling at a price I was willing to pay. Also, you have to wonder why an individual is selling the car. If the car has major prolems an individual may not disclose them where a dealer would because he needs to maintain his reputation. (There are some good and honest dealer's out there. If you find one you feel is "slippery", look elsewhere.)
I spoke with a Dealer in CT, Forza Motors, he was nice but I was not able to complete a deal with him. I ended up buying from Executive Auto Gallery in Pennsylvania. I found him through Hemming's Motor News. I worked with him through phone and email, he gave me good disclosure on problems he was aware of, sent me all the photos I asked for and answered all my questions. He was very patient and did not try to SELL me the car. He knew what he had and knew that I knew what I wanted. He let the car sell itself. He even held the car for me for 2 weeks with NO deposit! It was an 8 hour drive down to get it and when I got there everything was as described. I took the obligatory test drive and loaded it up on the trailer. Overall it was a good experience and I would buy from him again. Another advantage to buying from a dealer is getting the temporary registration so you can drive the car immediatly!