Daniel Gale Sotheby's International Realty agents can take potential buyers through Billy Joel's Centre Island home, a source within the firm tells RealLI. The agents were notified this week by e-mail that "they got permission to show it again." Joel let the listing on the $32.5 million house lapse last year, although word was that he still wanted to sell it. Last year he also bought two oceanfront homes in Sagaponack.