A "new" M3W may not be as sorted as a well maintained and modified/improved used car. New cars are still made down to a price, the exhaust system for example. As with all used cars, it is worth looking at what is on offer rather than just when it was made or how many miles are on it. Some owners of older cars have spent a lot of time and money sorting out the poor design and manufacture problems and now have a car at least as good, or more often better, than a new one.