There are many crooks out there who act as middle men. If you see a car from a seller in Cadillac, MI, he is one of them. He scans all the websites and cars for sale and posts them up and adds a much higher price. You then have to contact him with your questions, he contacts the seller, and if you buy it, I image it goes through him so he can collect his share and then buys the car from its original posting and has it shipped to you at your expense. Then when you receive it and it is not what you thought, it is buyer beware and you just got burned.
The 1973 Fury I bought was posted by him. He took all the photos from the craigslist ad, used the description and upped his price. It was listed for $3,800, but his price was near 7K for the car.
I myself have seen a few cars that looked interesting to me. Tried to get further info and simply don't get a response - so car was no doubt sold or bogus but the large number of cars on their listing made them look legitimate and as if they had a huge inventory. Probably some guy working out of his walk-in closet at home.
So if you cannot talk personally to the owner, and go see it or have an appraiser go look at it, then shame on you if you get burned.
I think it should be a law that if you sell a car/truck/vehicle, it must be in your possession and titled to you/dealership. If you are selling it for another party, then it should be law that you have to disclose this and be given a contact for the owner of the car so you can speak with him/her and if the car is bought, you get the title directly from them, not a third party or dealership. Most of these clowns know little about cars, they are simply flipping them in the hopes of making big profits.