Swap Meet area at Mustang Round Up....

I was there two years ago. From what I remember, most of the stuff that was for sale was hard to find stuff that fetched a higher price. (I was only looking at the classics stuff)

I think there was a 428 cj that was under a grand.
 
They don't have a "swap meet area", but they do have a lot of Mustang-related vendors. They also have a "for sale" lot where you can park your car with a for sale sign in it. Technically, if you put a for sale sign in your car on the show field they are supposed to tell you to remove it or leave.