On the collection of bound volumes, who can really say "value"? But they should have gone to a place like the Motion Picture Academy (and maybe they did!).
On the triple-bill, whenever someone tells me "I was told X was worth $10,000" I always say, "Did they have a checkbook out?". And they always say "No".
It is like guys here speculating on the teaser Bride of Frankenstein going for a million dollars. What they think means nothing. What matters is what guys with a million dollars think.
With that being said, this poster has been handled in the worst possible way so far. Next step will likely be an appearance in an auction catalog with something like a $10,000 reserve. And maybe he will get lucky. You never know.
Bruce