A car enthusiast made a unique purchase when he bought a transparent car at a Michigan auction for $308,000 on Saturday.

The 1939 Pontiac Deluxe Six has been called a "Ghost Car" because of its transparent Plexiglas body. It is the only known transparent car to exist. The car was created for the 1939 New York World's Fair and later went to the Smithsonian, where it was reportedly displayed until 1947. It also went through a series of Pontiac dealers in Pennsylvania till it came under the hammer - figuratively speaking - on July 30, at the RM auctions at the Inn at St. John's in Plymouth, Mich.

The family, who owned the car since the 1980's, were sad to see their beloved vehicle sold. Alain Squindo, a car specialist for RM Auctions, said he could not reveal the name of the buyer, stated the report.

Apart from a few cracks and chips, most of the car including its white tires is original, according to RM. GM collaborated with chemical company Rohm & Haas to build the car. While the outer body panels of the car were made with the clear plastic, its underlying structural metal parts were copper-washed. Other parts including the dashboard were chrome-plated.

The car reportedly cost $25,000 to build, which was a huge sum 70 years back.