This stunning Ferrari could end up being the most expensive car ever to be sold at auction when it goes under the hammer in two weeks. Due to be sold by RM Auctions at the Monterey Historic festival in California, the 1964 Ferrari 275 GTB/C Speciale by Scaglietti is one of only three made. It was also the first Ferrari to have independent rear suspension and a rear-mounted transaxle gearbox.