Unfired 1963 Daytona Max Wedge

I can relate to the security concerns. The best way to be is quiet about what you have and where.
I think if you can, take it apart to the short block and document the part and casting numbers of everything that comes off. You don't have to publish all of it (I wouldn't) but then if/when a real buyer calls you have what he'll want handy. You may find some parts are worth more seperately. Ultimately you're friend is looking for max return so it's in his best interest anyway.