Mayor Bloomberg's ex-wife, Susan Bloomberg, once owned a penthouse at One Kenmare Square. She sold it for $11.6 million in 2011, and since then the apartment has been more famous for its pricing quirks than its residents. The current owner, an LLC, first listed the place for $13 million in May of 2012. It was delisted and then relisted in October for a whopping $18.8 million. And now it's back, for $15.8 million. Perhaps the middle of the pricing range will prove to be just right.