By The Associated PressFORT LAUDERDALE, Fla. — A Los Angeles-based real estate investor has purchased the six-bedroom South Florida home that belonged to the late teen idol David Cassidy, and hopes to give it a fresh look on television.Amy L. Raff and her husband, Abe Rotchel, told the South Florida Sun Sentinel they weren’t looking to buy Cassidy’s waterfront home when they started looking at listings in Fort Lauderdale.“It turned out to just be a nice benefit that it used to be his house,” Raff told the newspaper.