Bought my 1990 300E in December for $1500 USD. Owner was told that it needed a $6000 engine rebuild because of smoking exhaust. Cost me about $50.00 in Gaskets and Valve guide seals and about three hours of a Saturday morning to fix. Now have a beautiful car that runs like a dream. Oh yeah, its got over 300,000 miles and does not use more than a quart of oil in 3,000 miles.