Lets see if I have this straight :
Military surplus, buried, no longer needed, and disguarded...
He spent 200,000 of his own money to find them - Finders keepers loosers wheepers.
A Spitfire today will be worth close to 3,000,000 USD and he says he's found 15 of them?
So he's sitting on 45 Million dollars worth of surplus spitfire - nice return