As far as private islands go, New York City's Rat Island isn't exactly luxurious. It's really just a pile of rocks that once housed quarantined typhoid patients.

But the island sold at auction Sunday for $160,000. Real estate agent Ozzie Crisalli says he doesn't know what the buyer has planned for it.

Rat Island is located off City Island in the Bronx. It boasts 360-degree views of the water and measures about 2 1/2 acres — during low tide.