Could it be, that these gentilmen referred to, are not selling their aircraft because they think they are SO valuable and are resoning their value will only increase as time goes by? I've seen quite a few of that type in my (admittedly, short) time in aviation. People that have the mindset, are usually completely ignorant of the fact that they are destroying their prized aircraft and reducing their prize to almost nothing.
Good luck trying to get the aircraft.