Ask the Science Fiction Museum what they would think about their restored Spinner that is hanging. Paull Allen paid a lot to get that car restored, and most of the stuff on it is "new/replica" stuff, but it still the BEST example of a screenused Spinner out there. I know many of the people involved in the restoration of that and more so the restoration of the Part 3 screen used vehicle. It is a labor of love to keep a piece of movie history from being crushed.
I seem to remember on one of the bttf DeLorean boards people were outraged over the destruction of the fiberglass flying DeLorean. That car was less "accurate" than the Part 3 DeLorean that screenused owns. I remember when Jeff and Desi bought this car, no one wanted it. Some of the movie car brokers would go to Universal and look at the vehicles and they would pass on vehicles like this, they had better luck getting an "A-Team" GMC van from Universal, throwing some paint on it, and make a quick couple grand.
Movie cars are very different than many other movie props because they are usually used in other productions, or used for promotional use after filming. There are some exceptions to this such as the Batmobiles owned by Warner Brothers, those are well maintained and stored in a warehouse. On the flip side look at the Batmobiles from the 60s, there are things that are changed missing, and some cars were used just as promotional vehicles, but since they have a history to the STUDIO then even that car has extra value.
There are a total of around 14 DeLorean time machine props that have any studio connection and extra value. No matter what replicas are built by which fans, at the end of the day the studio paperwork will always win out more so relating to the original vintage time period of the movies, tv show and Rides.
So out of all these cars, clearly the most desirable would be the actual screen used DeLoreans. So the one car was destroyed and is now a shell in Planet Hollywood's archives/warehouse as it is no longer on display. Planet Hollywood is a large corporation, not a private collector. The "A" car is still rotting away being stripped so people can make replicas that look better than the original film car, but Universal doesn't care about the car. The other car remaining that is screen used is the DeLorean in Florida, that USF just did a minor restore on, cleaned up some props, redid the interior and a few other things. The fiberglass car was destroyed. Many fans online want to "SAVE THE CAR," the "A" car. Nothing wrong with that, but that is exactly what Jeff and Desi did, they "saved a car".
I have known and been talking to people in the movie car business for the last 12 years. The stories are amazing. Sometimes the actual car will have different bodies put on it for different productions but the actual vin or studio serial number matches through all the paperwork. In the movie car world and the high auto collector/museum world, that is what matters. Ralph Lauren has a large Ferrari collection, many criticize him for over restoring his vehicles, but they look great and many times they are one of a kind. There is a point with vehicles where you have to save what you can, so a one of a kind that looks great, or a rotted out shell of a car, which is going to bring in millions? Another example is he Pollack Automuseum, I know the mechanic who worked for his museum, and Pollack was a pioneer in the American collector car hobby. He had a knack for finding things. He found a Mercer raceabout in the weeds while flying around one time. It was nothing but a rotted out frame with some panels... it was restored with a lot of "replica bits" however it is one of something like three remaining and is currently on display at another museum. Pollack is gone but the car that he restored lives on... And that is the point to the desert offroader.
It is a piece of movie history, it was there at Monument Valley the same grounds where film pioneers like John Ford with Stage Coach created iconic images of the "western." The hood box was designed by Micheal Scheffe who was the one who placed everything on the DeLorean in the first movie. It was designed and coordinated by Tim Flattery another well respected film artist/designer who still works on all the block busters of today. Micheal J. Fox was in that exact car for the filming of the movie. The car, the panels, the engine, and many of the props were the exact props that were there during filming... but since the car is survived a piece of BTTF 3 history has survived. Nothing can take away from the fact that Fox was Marty McFly in that exact vehicle, and that is the big thing. It is not a replica of a Part 1 car. It is a vehicle created for use in a film series... PERIOD. To call it a replica to begin with is an insult to the car, the owners and the fans of the film series. It is the only CAR that is in private hands. The train wrecked car you can't sit in. The "A" car and Oxnard cars are still owned by the studio in various conditions. None of which are museum ready, which this car is.
The other thing, and this is what is sad about the BTTF hobby, is at the end of the day, THAT car has hallmarks from all sides of the hobby. The hood box, the conduit, the interior, the research. Many of the best minds of the BTTF DeLorean hobby actually had a hand in building that car. It says alot how people complain about the car, yet the brightest minds in the hobby were involved with the project.