Keep in mind that the flea market is good for old parts and project machines. The show itself will have a free play area where I would say that the majority of the machines are for sale. This is where people tend to purchase machines, not as much in the flea market. That being said, there are usually threads that start at some point before the show where people chime in as to what they are bringing. Keep on eye on this if you are serious about purchasing. There are a bunch of machines that are "sold" before they even get to the shows.