9. 1950 Ferrari 166MM Berlinetta – $5,445,000
This unusual car started as a Ferrari Barchata, a racing car with an open roof, only to be later customized into a closed-roof Berinetta. The car survived sale through a used car lot and the death of its V-12 engine, which was eventually replaced. Though the car is unrestored, it was never parted from it’s original engine, which has been rebuilt and reinstalled in this former race winner.