3rd owner 1959 Desoto Firedome

I very recently impulse bought a very rare 59 Desoto 4dr sedan project. As the 3rd owner I am getting as much info on the history of the car as I can. How important is knowing the entire history of a car when owning/buying/or selling a vintage car to you guys? I have all the factory paperwork with the car and the previous owner is willing to share what he knows about the ol girl and want to ask the right questions. So far I know how long he drove it, why he got it, why he stopped driving it, and where its been since last driven in 1976 until I saved her.
Author: jayzee