I used the Bank of Englands Inflation Calculator, and that's about £60,000 in todays money which is absolute peanuts! Good investment as they;re going for £4m+
A good investment for sure, although the maintenance costs over the past 50+ years would have been considerable. As for value in today's money, our new house in 1968 was £4250, and now selling around £425,000. Still couldn't buy a Spitfire for that sort of money.