Couple of thoughts
First, this dealer is in a very wealthy part of the country, and it is not inconceivable that some investment banker might walk in with his bonus and just buy it because he likes it and because it is a lot cheaper than a vintage 911S.
Second, it would be great if the dealer shares with the rest of us what he gets for the car, but I am afraid we will never know.
Looks like a fine car from the pics, but all the details the others have noted should be fixed for that price, and it should have a Petri as well IMHO.
I hope the dealer gets all the money and I don't begrudge him making a profit, no matter how large, as long as the car is as high quality as he says it is. I wouldn't just call him a "flipper" without some cause to back it up. "Flipper" sounds a bit pejorative to me. Is Wayne Carini "a flipper", too? Some of these guys actually have some knowledge about cars that other people don't. The best dealers ones only buy high quality examples to re-sell and these types develop client lists that buy again and again.
Scott