Daydream Island, in Australia. Private Islands Inc. For many people, buying a private island hideaway is the ultimate dream.

Microsoft cofounder Paul Allen, Oracle cofounder Larry Ellison, and Virgin Group chairman Richard Branson have them.

But you don't necessarily have to be a billionaire to buy an island. Nearly a thousand islands come onto the market each year, and they vary greatly in terms of size and price.

With the help of island marketplace Private Islands Inc., we've found a few that you can buy right now.