If comparing size of country, then that point is valid. I see what you mean, Paul. But in my using Creat./Black Lagoon as an example, material from that movie shows up in many auctions and even though it does, it still can command a good price, even though it is not all that rare (quantity).
Same with other examples mentioned in this thread- This Gun For Hire, Attack of the 50' Woman, Forbidden Planet, BAT or Jaws. Nice prices always achieved with new examples appearing on the horizon.