2001-2010: E46 M3 CSL
The one-year-only (2004) Coupe Sport Lightweight variant of the third-generation M3 exudes a special sort of crazy. The untrained eye might not notice the revised bodywork, but anyone not struggling with advanced hearing loss can note the lightweight aspects: aside from some carbon-fiber components, much of the lightweighting comes via removing sound-deadening insulation... and the radio, and the air conditioning, etc. With only 1,400 originals built and none sold new in America, the chances of this car being remotely affordable by the time it's legal to import (2029!) are, give or take, zero.