http://forums.pelicanparts.com/porsche-cars-sale/1021026-1952-356-coupe-barn-find.html
This will make you feel better.
MSRP for a 1952 was $4k
What did the owner pay in the early 1970s? $10k? I have no clue.
$10k invested int0 the S&P in 1970 would be worth $750,000 today.
Just $4k invested int0 the S&P in 1970 would be worth $300,000 today.
So, he's actually getting a fraction of that.
Holding the car for 40 years was a colossal mistake, from a financial standpoint.
Feel better?