The main difference between an agent and broker is the number of responsibilities they're able to take on. A broker can do everything an agent can do, but they have the added responsibility of making sure all real estate transactions are lawful, all paperwork is accurately completed and all finances are accounted for.

Luckily, there are many places around the world that offer these chunks of land for sale, in the Caribbean, Greece, South America, Canada, the U.S., and beyond. Private islands come in all shapes and sizes and can cost anywhere from $200,000 to $200 million, depending on what you're looking for.

The majority of American private islands properties are located near the eastern seaboard, especially in Maine, New York and Florida.