Using The Long Count's link, I thought this could have some interest. If a boxing card could sell for $27,600 than a rare well preserved film could fetch at least this much. http://www.sportscollectorsdaily.com/rare-boxing-card-sells-for-27600/
I've always wondered what a grail piece like Greb-Tunney would go for...the hobby intrigues me, but I don't know enough about it given the private nature of the transactions (much moreso than most hobbies) to put an estimated value out there.
