MTV reality star Sam Logan of “Siesta Key” has acquired Villa Una, a Kobi Karp-designed waterfront mansion in Miami Beach for $13 million in an all cash deal. The new construction 5,600 SF home located 1485 Cleveland Rd. in Miami Beach offers 6 bedrooms and 6.5-baths on 0.26 acre lot. Jordan Karp of Jordan Karp LLC represented the buyer, Logan, while Pier Paolo Visconti and Claudia Llanes of Douglas Elliman represented the sellers.