Music legend Stu Cook, the 80-year-old bass guitarist for the beloved band Creedence Clearwater Revival, has sold his waterfront Florida residence for $7.5 million — down from its original ask of $9.97 million last year. The buyer was Myron Robbins, of Buffalo Management Group.  The Sarasota home had last asked $7.87 million. Cook and his wife Diana bought it for $2.95 million in 2013, according to property records. The band, from the San Francisco Bay Area, was best known for its politically