1955 Ferrari 410 Sport –Â $23,000,000
Offered at Rick Cole’s Monterey auction in 2014, this Ferrari 410 Sport sold post-sale for $23m. Powered by a 5.0-litre version of the Lampredi V12 engine, it was one of the most powerful Ferrari racers ever built. Just four were made, although all varied in specification and body style, making it unique.