They do a few shows here in St. Louis. I have not had the need to buy anything from them in a very long time but I do always stop by their tables/area and chat for at least a couple minutes. Pretty nice folk and their prices on glass are unbeatable.
I don't know if they have changed by now, I doubt it. But they used to offer glass tanks/aquariums at a dollar a gallon. Some years back I scored an awesome 170 gallon display tank for way cheap!
Now they have their own 18 wheeler but back then they just had a van and a trailor they took around. It was closing time for the show and they didn't want to pack it back up and drag it home again. I think I ended up paying $120 for it. Quite a steal on an already great price!
Acrylic is fairly new to them, I'm not sure how the pricing goes. But one thing you should consider is acrylic scratches very easily! Even the slightest abbrasive while cleaning will scratch it badly. Just a heads up.