1954 Ferrari 375-Plus –Â $18,298,500
Spot the trend? The car was destined for victory in the 1954 Mille Miglia prior to a broken gearbox within sight of the finish line. Following a number of outings at Le Mans and other races at the time, the front-engined 4.9-litre V12-powered car was sold into private American hands, before embarking on further historic race meetings more recently.