Visitors walk past vintage and classic cars displayed by Bonhams auction house, during an exhibition, at the Grand Palais in Paris, Wednesday, February 4, 2015. The Grand Palais is staging an exhibition of vintage cars, to be followed by a sale of historic cars by Bonhams auction house on Thursday. (Photo by Jacques Brinon/AP Photo)

Vintage and classic cars are displayed ahead of the Bonhams' Les Grandes Marques du Monde vintage motor cars and motorcycles auction at the Grand Palais exhibition hall as part of the Retromobile vintage car show in Paris February 4, 2015. (Photo by Gonzalo Fuentes/Reuters)

Vintage and classic cars are displayed ahead of the Bonhams' Les Grandes Marques du Monde vintage motor cars and motorcycles auction at the Grand Palais exhibition hall as part of the Retromobile vintage car show in Paris February 4, 2015. (Photo by Gonzalo Fuentes/Reuters)

Visitors look at vintage and classic cars displayed ahead of the Bonhams' Les Grandes Marques du Monde vintage motor cars and motorcycles auction at the Grand Palais exhibition hall as part of the Retromobile vintage car show in Paris February 4, 2015. (Photo by Gonzalo Fuentes/Reuters)

A visitor takes pictures of vintage and classic cars displayed ahead of the Bonhams' Les Grandes Marques du Monde vintage motor cars and motorcycles auction at the Grand Palais exhibition hall as part of the Retromobile vintage car show in Paris February 4, 2015. (Photo by Gonzalo Fuentes/Reuters)

Vintage and classic cars are displayed ahead of the Bonhams' Les Grandes Marques du Monde vintage motor cars and motorcycles auction at the Grand Palais exhibition hall as part of the Retromobile vintage car show in Paris February 4, 2015. (Photo by Gonzalo Fuentes/Reuters)

A visitor looks at vintage and classic cars displayed ahead of the Bonhams' Les Grandes Marques du Monde vintage motor cars and motorcycles auction at the Grand Palais exhibition hall as part of the Retromobile vintage car show in Paris February 4, 2015. (Photo by Gonzalo Fuentes/Reuters)

Vintage and classic cars are displayed ahead of the Bonhams' Les Grandes Marques du Monde vintage motor cars and motorcycles auction at the Grand Palais exhibition hall as part of the Retromobile vintage car show in Paris February 4, 2015. (Photo by Gonzalo Fuentes/Reuters)

Vintage and classic cars are displayed ahead of the Bonhams' Les Grandes Marques du Monde vintage motor cars and motorcycles auction at the Grand Palais exhibition hall as part of the Retromobile vintage car show in Paris February 4, 2015. (Photo by Gonzalo Fuentes/Reuters)

The 1927 Automobiles Excelsior Albert 1er Chassis Court Cabriolet is displayed ahead of the Bonhams' Les Grandes Marques du Monde vintage motor cars and motorcycles auction at the Grand Palais exhibition hall as part of the Retromobile vintage car show in Paris February 4, 2015. (Photo by Gonzalo Fuentes/Reuters)

A visitor looks at vintage and classic cars displayed ahead of the Bonhams' Les Grandes Marques du Monde vintage motor cars and motorcycles auction at the Grand Palais exhibition hall as part of the Retromobile vintage car show in Paris February 4, 2015. (Photo by Gonzalo Fuentes/Reuters)

A Harley-Davidson motorcycle blessed with the signature of Emeritus Pope Benedict XVI, and later received by Pope Francis, is displayed ahead of the Bonhams' Les Grandes Marques du Monde vintage motor cars and motorcycles auction at the Grand Palais exhibition hall as part of the Retromobile vintage car show in Paris February 4, 2015. (Photo by Gonzalo Fuentes/Reuters)

Visitors walk past vintage and classic cars displayed by Bonhams auction house, during an exhibition, at the Grand Palais in Paris, Wednesday, February 4, 2015. (Photo by Jacques Brinon/AP Photo)

A worker cleans aFerrari Testarossa coupe 1989, during an exhibition, at the Grand Palais in Paris, Wednesday, February 4, 2015. (Photo by Jacques Brinon/AP Photo)

A visitors looks at a Isotta-Fraschini 8A ss cabriolet 1930 displayed by Bonhams auction house, during an exhibition, at the Grand Palais in Paris, Wednesday, February 4, 2015. (Photo by Jacques Brinon/AP Photo)

Vintage cars and motorbikes are displayed during an exhibition, by Bonhams auction house, at Le Grand Palais on February 5, 2015 in Paris, France. (Photo by Antoine Antoniol/Getty Images)