A penthouse at Ocean House has just sold for a cool $15mil in the posh South of Fifth neighborhood on South Beach. The 4,176 sq ft South Beach penthouse was originally listed at $18,500,000 and then saw a price cut to $16,900,000. Jonathan Castaneda from Fortune International Realty represented the buyer and Dora Puig from Puig Werner Real Estate Services represented the seller. No word on the who the buyer is. You can check out the photos of this sweet pad here.