It's not so much as it looks "cool", to me it tells a story (not talking about a rust bucket), it seems like it's still useful just as it was. It's still original. The fact that it's popular now to recreate an old look, with "Joe's Garage" painted on, is evidence that the younger guys like it. But the real deal is nice to see. They all have a few dents when you get them. Antique collectors, which we can be called, never want anyone to touch a piece of furniture or bronze or a gun or sometimes even a truck. If it's neglected rusty, I say no, but if it's just old, rubbed off from usage/age/sun but kept out of the weather mostly, that's patina. With logos also, priceless.
