When I had to sell mine it was the only car I ever sold that I almost cried when it left. And I still miss it. But it was set up for road racing and not really a great street car. Plus my failing health and the 118° days here in the Summer made it impossible to drive very far. I didn't want to just have it set and rot so I decided to sell it to a cousin who wanted it. There are just to many reasons why people sell them to really pin it down to a few common ones I believe.
Ron