Its 6.9-liter straight-eight engine produced 265 hp on the normal version and 320 hp on the supercharged SJ model. With an average current sale price of $1.5 million, it can reach up to $10.3 million for some special editions like the Murphy-bodied 1931 Duesenberg Model J. 4. Mercedes-Benz 710 SSK Trossi Roadster (1930). But the jurors thought otherwise, and picked four precious pre-war automobiles as nominess for the “Best of Show” title: A 1930 Mercedes-Benz 710 SS Special Roadster from the Auriga Collection in Germany, a 1937 Mercedes-Benz 540K Special Roadster owned by Jim Patterson from Kentucky, a bright blue 1932 Alfa Romeo 8C 2300 Corto Figoni The Mercedes Benz 540K Spezial-Roadster - Recreation, has a fascinating vehicle history. It was built in 1938 and is equipped with an 8-cylinder engine and a displacement of 5400ccm. This vehicle has been meticulously assembled over several years, with the original components including the chassis, engine, transmission, and axles. A: The highest sale price of a 1939 Mercedes-Benz 540K was (USD) $7,480,000.00 (highest sale at auction). Q: When is the most recent sales value of the 1939 Mercedes-Benz 540K? A: The most recent sale of the 1939 Mercedes-Benz 540K was in January of 2023 at Barrett-Jackson : Scottsdale, Az. where it sold for $533,500.00 (USD). tUUxs.