BMW only made three Nazca M12s ever, so spotting the futuristic supercar is a mighty tall order. However, in 2011, a pristine 1991 M12 was actually on sale at a Czech dealership for a whopping €725,000, or about $742,000; apparently, it was rumored to be made specifically for the Sultan of Brunei, and had only 18 miles on its odometer.