i have a prop from a motor i sold .... i am thinking of selling it...but don't know how to identify in a knowledgeable way to a potential buyer what it is...pitch sized etc.... the numbers on the prop with 3 blades are P692 0371 and 692265.... on the outside of the prop it says: spinel 283 and also 16 or 18...can't tell if that is a 6 or 8.......those are the only indentifying things i see? also, how would i place a value on it ... it came off a 1990 90 hp force motor...actually it was a back up...never been used/or touched water... great shape...thx for the help