I could understand if it were a Tahoe of this year.
These cars just don't age like that. On top of the fact that its been enthusiast owned it whole life, thus being cared for just the same with more documents than probably any car in this site.
Its just like any other car thats being sold. If you are looking for cheap ones, they are out there. If you are looking for the RIGHT one that has documents to prove the level of maintenance and care, they are out there as well. They also happen to be worth much more because there are fewer and fewer clean examples of these as time goes on.