Five deals over $1 Million selling price closed in Key Biscayne during the period of Sept. 19-23. A fully remodeled Casa del Mar corner unit in Key Biscayne was the highest seller with a price tag of $3.475 million. The property boasts 3,120 square feet, two balconies and endless views fit for the lucky buyer. At the above million dollar price point, five properties closed in Brickell. The top seller was a 2/3 unit (1451 Brickell Ave., Unit 3702, Miami, FL 33131), which sold for $2.2 million after sitting on the market for 3.5 years. A 2/3 unit Below are all the closed residential real estate deals in Key Biscayne…