A California mansion could become the most expensive US property to be sold at auction when it goes on the block next month with a starting bid of $22 million.

The 10,500 square-foot beachside house — originally listed at $65 million — includes six bedrooms, nine and a half bathrooms, a theater, a 75-foot (25-meter) two-lane lap pool, a gymnasium and a library with an aquarium.

The winning bidder would count Tom Hanks, Barbra Streisand and Sting as neighbors after moving into “Billionaire Beach,” part of the upscale coastal town of Malibu, near Los Angeles.

The ongoing saga of the sale of the most expensive villa in the world continues.

Back in August we reported that Prokhorov, the Russian billionaire, was the mysterious purchaser of the Villa Leopolda – on the French Cote D’Azur – at the price of 365 million Euros ($545 million) – which was a staggering price to pay for a single property.

Now the London Times reports that Prokhorov paid a $55 million deposit, but wants to back out of the deal (Prokhorov reportedly lost $7 billion in the economic crisis).