I have been waiting for this material to decline in price, or even stabilize, since about 1968. My hopes have been dashed. I cannot account for people interested in this material, who are unable to study the past, develop their empirical skills, read and reflect. I suppose these traits are dying out in this society, generally. I collect this material because it has always interested me, and, despite forty years with it, I still have much to learn and understand. sapere aude.
