Only two SSJs were ever built in Duesenberg. This rarity made it the costiest American car ever when it was sold in July 2018 at Pebble Beach, for $22 millions. This particular SSJ was once owned by Gary Cooper, a Hollywood star. The SSJ was one of the most powerful cars of its era with a 400-bhp inline, eight-cylinder motor. ¹⁾

The 290 MM was developed by Ferrari for the Mille Miglia, which received its MM moniker, for the 1956 World Sport Car Champion. Scuderia Ferrari ran that 290 MM in 1956-57 and led him to the victory of a private team, amongst them Juan Manuel Fangio, Phil Hill and Sir Stirling Moss. It has been sold for $22,005,000. ²⁾

The Aston Martin DBR1/1 from 1956 is one of the latest additional items to this list that had been sold for the most expensive British car ever sold at Monterey Car week in 2017, for $22.5. In 1959, in the hands of Sir Starling Moss, she was the first in five DBR1s and enjoyed a considerable race success. ³⁾

Sold for $26,400,000, it is one of only 3 Ferrari GTB/C Special models which were designed to accredit its new 275 GTB race car by Maranello in late 1964 and the beginning of 1965. The 275 GTB/C Specific was significantly lighter and quicker than a standard 275 GTB roadcar with an aluminum bodywork, a lighter chassis and a tuned V12 engine, with a 70bhp extra mounted lower on the vehicle to bring the center of gravity closer to the track. This 275 GTB/C Speciale never witnessed competition but one of the other cars finished third overall in 1965 at Le Mans. ⁴⁾