50 years young - Maserati Boomerang Concept, 1972, by Italdesign. Among the concepts and prototypes turning 50 this year, the Boomerang was based on the Maserati Bora (also designed by Giorgetto Giugiaro). It was only ever intended as a "dream car" and remained a one-off, in 2015 it was sold for €3,335,000 ($3.7 million)