My dad has an 85' Chevorlet Celebirty, it's in showroom condition. It has about 2 nicks from rock's hitting it (very small). No rust or anything. Has 25,000 miles, and the first year he had it, he put on 12,000. Everything is original, Ecept Tires/brakes/Sparkplugs (they are numbered to which cylinder they went to) And when I say original I mean orihinal all the way down to the windshield wiper fluid (

)
We have the battery dissconnected since we dont use the car (been sitting for 4 years) And we try to start it up every 3 months.
I know it's nothing special to you guys, but it kinda has centimental value to me/my dad.
The only problem is that since it has been sitting the headliner has fallen down.
Do you think it will be worth anything in the future, because I mean whenever you see one, it is all rusted out and stuff, and it should be worth alot if it's like 1 out of 100 good condition car's, right?