Well, I am sure nobody could decide not to buy a Maranello after having been close to one or having testdrove it! it's such a good car it aches!
What you did to those boys is pretty impressive! It's not so obvious to give away personal infos and shere your own cars with basically strangers!
Similar stuff happened to me too (in the position of the boys obviously) and it always felt too good to be true! Generous owners are really a gift from the sky