If Greb film still exists, what cash reward would flush it out of hiding?

Imagine that an eccentric billionaire decides to offer a cash reward for a copy of Greb fight film.

How large would the reward have to be to *probably* guarantee that any film that actually exists will be flushed out of the woodwork?

 

That was my initial thought, but huge cash rewards tend to generate search efforts. And search efforts, in turn, might send people off to start knocking on doors of people who might not otherwise know what's in their old collections.

 

*Files the Greb Mythicist Movement away as a project for another day *

 

Only for $300.

 

If most members of the film collecting fraternity are as tenacious as Klompton, I don't think Squid Games would be enough to shake the film out of them. At least not against their will.