Founder Chris Krolow runs a marketplace for buying, selling, and renting private islands. More than 20 years later, Krolow is now an island expert and the owner and operator of Private Islands Inc., a marketplace for renting and selling islands around the world. From tour guide to island salesmanSapodilla Private Island, one of the properties Krolow owns with his business partner, David Keener. He'd stumbled on a smart formula: Marketing a private island individually is expensive, as the audience for rentals or sales is small and dispersed. People aren't just crazy about renting islands, but they'll pay a premium to own one," he said.

---