It is not really to tell your friend what he might already know he has etc... It would be more about him being able to get more money for it, than say the price of an old Adams. If he ever decided to sell it.
So what if he would say, I am going to give it to someone in my family, never going to sell etc... blah blah blah. well they might want to sell it, and would not be able to do so if it is a day Pete is no longer working on or looking at cues to verify them etc....
Looking under the bumper could rule it out pretty quick like though.