Cars that survived in their original "as delivered" condition are the once in a lifetime finds.
Kind of like the find of Otzi the Iceman in the Alps - a 5,400 year old man frozen in time.
http://www.smithsonianchannel.com/sh...003749/3418243
Compare that to cars that "survived" 50 years and are still here on the planet and you get a whole different batch of contenders. These are the ones that show up every week on ebay and regaled as "Survivors" by the sellers. "A survivor with only one repaint, new interior, and a replacement engine"
Kind of like finding some dried up bones in the desert.