 1989 Porsche 911 Turbo Coupe. $176,000 | The RM Sotheby’s Motor City 2015 auction was staged July 25th at the Concours of America at St. John’s in Plymouth, Michigan. The 21st annual sale featured 80 automobiles, including American classics, sports and muscle cars and late-model collectibles. |
 1957 Cadillac Eldorado Brougham. $125,000 - $175,000 |  1961 Chrysler 300G Convertible $121,000 
1958 Buick Special Convertible. $57,750 |
 1968 Shelby GT500 KR Convertible. Sold for $203,500 |  2005 Ford GT $319,000 |
 1933 Packard Twelve Individual Custom Sport Phaeton in the style of LeBaron. $583,000 |  1932 Buick Series 90 Coupe Roadster $176,000 |
 1929 Stutz Model M Four-Passenger Speedster by LeBaron. $302,500 |  1934 Pierce-Arrow Twelve Convertible Coupe Roadster. $297,000 |
