Here’s what $4.36 million buys in Aventura: a penthouse with four bedrooms, 6½ baths and a price tag of $880 for each of its 5,000 square feet.

The unit is the top-floor penthouse at Bellini Williams Island, a 24-story tower developed in 2013 by Martin Z. Margulies at 4100 Williams Island Blvd. It’s one of 70 luxury condominiums built with private elevators, concierge services, computerized access and granite countertops in a development with four units per floor.