Now, if you knew the prop was the right size and
pitch for the boat, it wouldn't be as much of an
issue.

There are a total of four very different boats that are candidates. I
have a feeling one will work. Again, no point in wasting a prop and
leaving it in a garage.
I don't quite get your objection to someone who is generous handing out
an old prop and someone else taking the prop and in turn trying to
finding a home for it with some friends. There are a LOT of sailboats
at my yard and I'm friendly with more than half the owners, some work
HARD to keep their boats going. If my friends can't use it, one of them
probably can.
If you think I'll sell it on Ebay, just watch ebay for it. You won't
see it.

RB
35s5
NY