Those of you who fly through LAX may have noticed one or more wide body aircraft parked on occasion on the ramp on the south side of the airfield adjacent to an general aviation FBO facility. These aircraft have been seen at LAX for many years now.
In many cases, these are privately owned aircraft that are, quite simply, very large business jets. A number of these wide bodies are based in the Mideast and are used for personal transportation by various royal families in that part of the world.
BTW, back in the day, there was a Boeing 707 parked at SBA near an FBO for several years. It was a personal aircraft used by a Saudi royal prince who was attending the University of California Santa Barbara at the time.