Yeah, I have been reading up on barn finds and garage finds. If you have the time, patience and money then there is a real market for finding old cars.
In America they call it 'Automotive Archeology'. It could catch on here in the UK as a hobby, but it involves people actually going out wandering and looking for tucked away cars.
Anyway if you have the money and time like this guy does then its clearly worth doing.
Tom