While getting the nickel tour of Kermit Weeks place in Ocala, he asked what do you think is the most valuable thing in the room. In the room were Mustang engines, vintage radials, etc. All kinds of goodies on pallets neatly on shelves. Most people pointed at the rack of engines. He said, Nope! Pointed to a rack of beat up looking old props and said "Those are all that's left to make copies of to run on some of the vintage engines"
I've got a WWI vintage metal (brass?) leading edge clad Flottorp (think Jenny) that someone made into a clock. Hangs on my wall, too cool for school. Too bad they chopped the diameter down a little, but it may have been a damaged prop in the first place.
EricV