[wterrell]

saxman,
You are speaking of collecting the "lower end" of collectibles. That is where the restoration occurs.
The upper end of auto collecting abides by the rules of rarity and condition that apply to handguns. Hitler's auto is worth more in original condition than restored. An original Ford Model A with 10,000 miles on it is worth more than any similar Model A that has been restored to mint.
There is no argument to justify restoration of the more desireable items.