I concur, and it's not just marbles either, although i can't say the same for clocks, they have went up in price and are selling really good, this time last year i sold several Coca Cola clocks and some other advertising stuff and got buyers price out of it, the same clocks are now selling for Collectors price which kind of has me stumped. Nothing to do but wait and see what happens with the economy, FWIW i been finding some cool stuff on the bay, but then again i mainly collect swirls...
Just ask Darla she will tell you there is stuff to be had......