I think most of the last ones are all fixable. I have heard for about $250K or so, you can have copies or fakes made that even Ferrari technitions have a hard time telling. Also, I have heard there are more than a few Ford GT-40 with the same serial number. You just need the serial number on a part ot be able to register the car. I think the GT-40 had 5 or so serial numbers on different frame parts. Still, expensive crashes.
Tom