Well I'll be a monkey's uncle, you mean a printers proof, that's actually been proofed?
Maybe we shall have to come up with another name for those other "printers proofs"
Oh wait. Silly me. They are unmarked, UN proofed, printers proofs, (must be even rarer)
:p
Ps sorry No idea on value.
Ps, devils advocate, is a printers proof a real original movie poster? It was never intended to be used in a theatre...
Oh boy.....
Can of worms?
Double :p