I did it! I stopped in at the antique mall. Well, hubby and I didn't just stop in. We spent quite a long time going up and down all the aisles. He was helping me find marbles. I found so many actually that I chose to leave some behind.
They weren't fantastic. The best thing I left behind was vintage bag of Marble King cat's eyes. If it was the only thing I found I would have gotten it and counted myself lucky, but it was priced a bit high, and I already found this bunch for $25. And that was enough.
One jar of "stuff" which was priced at $5 and had a few marbles, including the shooter bumblebee, and a ceramic figurine from Japan, and other fun non-marble things. Then there was a $20 jar which was half full of big red clearies ... and I LOVE clearies. And it had other decent marbles, including a bunch of cross-through cat's eyes. And the jar itself was a blue mason jar with a zinc lid. So it was a good day.
I'm gonna need to research that marble with the green center ribbon and the red and blue patches on the ends. I get a Vitro feel from it, though the colors seem more Marble King-ish.