Let's face it, the market in collector and restored autos is purely emotional. There is no rational reason to pay a buttload of money for a car that doesn't drive as well, handle as well or have the safety equipment of today's cars, and that cost perhaps $2000-$3000 brand new.
It's another manifestation of boomers with lots of money spending it on toys form their choldhood. The same was true of "brass era" cars (cars of the 20's and 30's) until recently, but most of them are losing value as the people of that era age and pass on.
In such a market, having an original ONE MILE car might be worth another $10,000 or more, just by itself.