Suggest finding two or three coin shops in the area (a Google search will turn up a half dozen or so in greater St Louis), Visit them with just a small sampling of what you have--don't share that you have a much larger accumulation. Have the proprietor take a look at what you bring in and see what they say--observe how they handle the pieces, etc. Check online reviews if accessible. If you get positive vibes, great. If something feels odd, thank them for their time and gracefully exit.