Don't you just hate the fact that these photo collections get split up and thereby losing all their historical context / background?
Fine if the material is from a prior collection, with little or no integrity, but original coherent sets, especially photobooks, should be kept together!
Those (grand)children who are selling their heritage for a buck (even less if they have sold it to dealers) should be ashamed.
OTOH, it wouldn't surprise me if these dealers have connections with retirement homes, clearing up behind the recently departed with no relatives to care for them.
What a laugh most of them will have when they buy this material at € 5,- the bulk and sell it at € 50,-
Well, that's my eBay blues ...
the same could be said for any other collectible on eBay and beyond
and sometimes the reverse applies when original sets get together again...