The 5.8-mile property, spanning 2 islands with 6 beaches, was put up by Bespoke Real Estate ... complete with a library, movie theater, and even a Japanese bathhouse.

Epstein bought the smaller of the two -- Little St. James -- in 1998 for $7.95 million. He added to his portfolio by snagging the neighboring Great St. James for $17.5 mil. He developed the properties until he was arrested in 2019 on sex trafficking charges.

Prosecutors claim Epstein would take girls -- some as young as 11 -- to the islands, where he and his cronies would sexually assault them.

As you know, Epstein was found hanging in his jail cell in August 2019, which authorities say was a suicide. Since his death, the properties went up for sale, along with his waterfront compound in Palm Beach for $18.5 million, which was later demolished and his townhouse in New York City for $51M.

Money from the sale of the islands will go to his estate, which is still facing huge lawsuits.

So the question ...