Well, here in PA the weather is getting a little warmer, and flea market/yard sale season gets underway. Spent a little time out hunting the last two days. I didn't buy anything, but at least I saw some glasses out there to be had. Some were a little overpriced (Slowpoke for $60), most were in the typical $1 to $5 range for the common glasses you'll see most of the time. The coolest thing I saw (and it isn't anything jaw dropping) was one guy had all 28 of the Mobil tall NFL football glasses that were issued in the late 80's. I see the glasses a lot, but never all 28 in one place. And if someone came along and needed/wanted them, $40 for a complete set where you don't have to do a lot of legwork to complete the set isn't bad.
I wish everyone happy hunting and encourage you to tell us what you're finding out there.