Anywhere between Springfield and STL?

There is one at the intersection of H. 50 and I-44 between St. Clair and Gray's Summit, but I don't know if it is open this time of year.  That's pretty much all, unless there is one off the highway in one of the towns along the highway (I haven't heard of any).  I don't recall seeing anything between Rolla and Springfield, either.  There is a big ass flea market in Springfield off I-44, just past  US 65.

On 44 at Union Exit there is a good one. There are more people that come set up their stuff during the spring. Winter they have 2 shops that they sell stuff out of.

There is one on the east side of springfield near the trucking district off of I-44.  It's pretty big, usually.