Determine the valence intensity of the writer's mental state conveyed in the snippet "Among them were a 70-million-year-old shark, the late Buddy Rich's drums, wallpaper by Frank Lloyd Wright, an F4S Phantom jet used in Vietnam, 9,000 seashells and 25,000 beetle specimens.". Provide a score from 0 to 1, where 1 signifies very positive and 0 signifies very negative.