The Movieland Wax Museum has been sold.

After six years of declining attendance, the 21-year-old Buena Park museum was sold by Chicago-based Six Flags Corp. for more than $5 million to F & P Operations, a San Francisco-based partnership that includes Thomas L. Fong, who owns the wax museum at Fisherman’s Wharf and other attractions in San Francisco. But Spoony Singh, owner of the Hollywood Wax Museum, has filed suit in state Superior Court to stop the sale, contending that he had an earlier agreement with Six Flags to buy the museum.