Oil-rich sheiks, mega-millionaire British businessmen and even the brother of Russia's president, Vladimir Putin, are fighting to get their hands on the Holden Efijy.
They have bid millions for the one-off Holden hero car, which has just starred in the Woodward Dream Cruise in Detroit.
None of the potential buyers has come close to claiming the car, but their interest could spark a plan to build $1 million-plus copies.
GM Holden has officially dismissed the chance of building any extra Efijys beyond the one-off motor show dream machine, but the worldwide interest in the car could lead to a potentially lucrative opportunity to commission a limited production run.
Even so, if Holden gets enough serious offers for the car it could make a viable business case to build the 21st century hot rod in limited numbers with a $1 million price tag.
The exact interest in the car is unclear, but GM Holden executives confirm there have been semi-serious approaches from several people with the cash to splash on an Efijy.
The Tom Walkinshaw organisation has the ability to build copies of the Efijy, through a range of its businesses including Holden Motorsport and Elfin sports cars, and it could be an ideal partner on an Efijy project.
The only Efijy is in the United States where it has been extremely well received and has won numerous awards including the 2007 North American Concept Car of the Year.
According to designer Richard Ferlazzo the Efijy cost Holden more than $1.2 million to build by hand and any potential production versions would carry a similarly large price tag.
Its wicked retro coupe body is built over a stretched Chevrolet Corvette C5 chassis and is powered by a super-charged version of the 6.0-litre V8 engine.
