It's all a matter of what the car market will pay.
Not too long ago, American Muscle cars were C-H-E-A-P.. During the first OPEC oil crunch, many were abandoned to rust, crushed and given away for next to nothing. No one wanted to try feeding a gas hog on gasoline rationing.. Even back then, I knew American Muscle cars would be a good investment and I hand many, many chances to own more than I could ever want..
Fast forward to the here and now. A few years ago, before the world economic crash.. These same American Muscle cars were fetching millions at auction. Granted these are restored to new cars, but they are the same gas gulping, mass produced cars from Detroit that no one wanted back in the day..
All I'm saying is market demand sets a price on any particular car and it is based on perceived desirability more than actual content.
As for "New Old Stock" cars and parts.. Everything ages and degrades. While it might be possible to store a NOS car in a sealed nitrogen filed container to slow down the degradation process, it will never be as new. Even the sun will eventually nova and all of human existence will be completely wiped away and forgotten...
So, I have always believe it is best to enjoy your favorite what ever when possible. In the case of cars, care for them properly and they can give back in return the joys their creators put into them.
As for the X, it remains one of the very best fun -vs- cost two seaters to this day.. Maybe one day, the rest to the car market will discover them and paying over 25K for one becomes typical.. Regardless, I really don't care if this happens or not, I'm just going to "Enjoy The Ride".
Bernice
That one looks pretty nice and well preserved... but I still wouldn't pay $25K for it (Canadian or US).
Actually I wouldn't want it... its simply too nice. Given its a true time capsule, I would be afraid to drive it...