Well, some of them are great collector pieces.....the problem is that most need restoration.....But, I've done luthier work for years, and refinish as well.....so it's an interesting hobby.
I used to dream of having a guitar like some of the better ones I mentioned (back in the early Beatles days, that is), and I guess it's just a soft spot with me. Buy a few, restore them, play them a little after a good set-up, and then sell. Lots of fun. Like A-Bodies only smaller scale.