Hello, I'm new to the forum and this is the first post I've looked at. I'm with the others on sentimental value. My input is...when, in your lifetime, would you ever have to opportunity to buy back a family car, especially the one you mentioned? If the owner sells it off to someone else, I wouldn't count on ever getting it back again. And also, sounds like time is of the essence? If your truly concerned about that vin tag, here's what I would do. Get a signed letter from the body shop (how does a reputable body shop of ANY kind, LOOSE and fender tag? That sounds like the most irresponsible thing a body shop can do) stating that they have lost the original fender tag. With your documentation, there has to be a reproduction fender tag you can get. Your paperwork ties everything together, so the next potential buyer should have no problem with a fender tag that is not original metal. Why would they care? I'd keep the car and pass it on through my family if you don't plan on keeping it forever. Hope this helps. Sorry, on it's value, could be anything. I'd eventually have it appraised if it is of utter concern.