In terms of the R129 Mercedes-Benz, it doesn’t get better than this. This is the SL73 AMG. Just 85 were made and they are the only SL fitted with M297 V12, which is a variant of the M120 that was tuned by AMG. This is the same 7.3 V12 that powered the early Zonda cars and, of course, the CLK GTR Straßenversion. It is basically the cream of the crop when it comes to the naturally aspirated Mercedes V12 engines and threw down an impressive output of 561 horsepower and 575 lb-ft of torque. Even looking at it is worth the price of admission. But to have the engine and all the car wrapped around it? Bring a very large check.