Two of the rarest BMWs in America (and the world) in one place. The e24 Alpina B10 3.5 is the only one of its kind that exists in the Western Hemisphere and is one of 14 that are known to be left in the world. It is a rare sight to see one of these cruising down the street, but seeing one together with another e24 Alpina is a whole different ballgame.