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 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.

You can only use the island for a specific time - meaning that the longer you own the island, the less the developments, for which you have paid, are worth. If the lease is for a specific use and you wish to change the use, you may lose your rights to the island.

You can find private islands for sale via Private Islands Inc. or Vladi Private Islands, or by contacting a realtor who specializes in big-ticket sales. Additionally, some high-end real estate companies, like Sotheby's International Realty or Christie's International Real Estate, list private islands for sale.