[log in to unmask] wrote:

>It is pretty well-documented that 2nd hand markets for ceramics existed in
>at least larger eastern cities in the US.

Glass, too. 
We excavated a second-hand store several years ago and found many
apparently unsalable glass vessels and any number of glass photographic
negatives. The report is, appropriately enough, called JUNK and brand new
copies are going cheap.

Adrian Praetzellis
Sonoma State University