I agree as well Joel. A lot of the cars on the list are not ever going to be truly desirable. That doesn't mean I don't want some of them sitting in my garage, but I think a lot of them will never bring huge money or be particularly desirable. People will still want them, but most people aren't going to want a 85 Buick Regal anywhere near as much as a documented Buick GNX or Regal T-Type. Same goes for most models of that era - it will depend on the rarity of the car.
I think even the less desirable cars will increase in value, but not quite so drastically. I personally don't buy anything for it's rarity though - I buy it because I like it. I mean you've even mentioned it before Joel - Miata's are not a rare vehicle and they're not hard to find parts for. Their value is fairly low and they probably won't become collector cars anytime soon, but I still love mine like it is something special. I could easily find another one just like it, but it has meaning behind it and it's thankfully in good enough shape to make it worth shining up again.
Another example is I watched Fast N' Loud(Gas Monkey Garage) last night. This episode was centered around two Mustangs - A 72 Mustang Fastback 302 4spd car in baby poop green with matching interior and a 70 Boss 429 Mustang which was black on black and was a survivor car, with no restoration needed. They put $7,500 down on the 72 Mustang to buy it and invested about $5,000 in it to make it look nice then they paid $120,000 for the Boss 429 and just invested some labor in it. They took the Boss 429 to Barrett-Jackson expecting $200K +(Which it should have easily brought) and it only sold for $155k which shocked me.
Total investment in the 72 was around $13,500 and it sat for a couple of weeks, so they tossed it on eBay. It sold for $52,000! A run of the mill 72 Mustang in an ugly color, with some nice wheels, reupholstered seats, a Mach 1 hood, stripe kit, and front spoiler. So I guess my point here is, something is only worth what someone is willing to pay for it. Sometimes certain cars strike a nerve with people and bring back fond memories. Some people can't put a price on that. I've done it with a couple of cars myself.
I personally have my limits now though, but I am perfectly willing to invest $5,000 or more into my Miata and I fully realize i'll never make that back. No one is going to buy a 1990 Miata with 166k miles for $7,000. It's special though because it's the first project i've bought since we've been married. Sure, there were other cars that could have filled the same role, but when I sat in it the first time I knew it was right. I made me smile to just sit behind the wheel of it, like I was a kid again. I think my wife knew when she saw me behind the wheel that it was right too, or she jut was sick and tired of hearing me talk about it
