Software mogul Marty Sprinzen has what might be one of the largest collections of old masters in New York City, some seriously impressive wood molding, and an exceedingly cozy-looking fur blanket. New York's Jhoanna Robledo takes a tour of his 4,552-square-foot apartment at 838 Fifth Avenue, which was once owned by Lily Safra and is now on the market for $24.5 million.