‘Mansion Global’ host Katrina Campins showcases the gorgeous properties on ‘The Big Money Show.’ Johnny Carson’s former New York mansion is officially on the market. The 9,923 square foot home sits on a 1.94 acre property and is for sale for $5.3 million. It features many sought-after amenities. Built in 1928, the house boasts six bedrooms, in addition to seven full bathrooms and one…