Mileage: epically low.
Each one took a full 18 days to be hand-built by Porsche. Production lasted only from 1991 to 1994 and every Mercedes-Benz 500 E was transported back and forth between the Mercedes plant and Porsche's Rossle-Bau plant in Zuffenhausen, Germany during assembly. Essentially, the 500 E is a high-performance version of the W124 sedan, powered by a 5.0-liter V8 with 322 hp and 354 lb-ft of torque paired to a four-speed automatic. 0-62 mph happens in about 6.1 seconds and top speed is 161.1 mph.
Those numbers may not be utterly amazing by today's standards, but back in the early 90s they helped earn the 500 E the nickname "Wolf in Sheep's Clothing." Other hand-built add-ons include a wider stance, lower profile, flared fenders, side skirts, front air-dam, and wide tires. All told, just over 10,000 examples were built before produced ceased, and a damn near perfect one is for sale. The seller claims this 1992 500 E is a California car, meaning there's no rust and mileage is epically low at just over 34,000. It even comes equipped with the uber rare AMG OZ wheels. There doesn't appear to be any body damage, other than a noted minor accident in a parking lot by its previous owner.
The entire rear end was replaced at the weld points with the rear of another 500 E so that everything remained as original as possible. Something like this will more than likely increase in value in the years to come, but it can be yours right now for $58,000 in change.