Dr. Atul K. Amin has listed for sale a four-bedroom, 4.5-bath condo at 4600 N. Ocean Dr. in Riviera Beach for $2.899 million. The 4,088-square-foot condo is part of the Beach Front at Singer Island, a development in Riviera Beach Bayside that was built in 2007. Mitchell S. Frank is the listing agent for the property.