A California man has purchased a luxurious Merritt Island riverfront mansion built by one of the Space Coast’s foremost benefactors for a whopping $5.5 million, ranking as the secondcostliest residential sale in Brevard County history. “This is a spectacular property. It belonged to a wonderful woman named Myra Haley, who was probably one of the largest philanthropists in our area — a close personal friend of mine as well,” said Stephanie Moss Dandridge, a real estate advisor with One Sotheby’s International Realty in Melbourne Beach.