Jon Bon Jovi is standing in the way of a mystery buyer and one of the biggest real estate deals in US history.

The American rock star is the last obstacle to an anonymous client who has been quietly assembling one of the most valuable private estates in the country.

So far, the unnamed buyer, whose identity is a closely guarded secret, has paid roughly $250 million (£182 million) for four separate homes in Florida’s Palm Beach – and is pushing for more.

The mystery investor wants the $42 million (£31 million) mansion belonging to Bon Jovi, who has resisted staggering overtures to sell his property, people familiar with the situation told the Wall Street Journal.