[Rot 911]

I wonder if it really was one of the movie's cars.

From the listing: "The first production Modena Spyder California, this car was manufactured by Modena Design & Development, of El Cajon, California"

From the history of the movie cars: "Auto restorationist Mark Goyette designed the kits for three reproductions used in the film and chronicled the whereabouts of the cars today: [16]

1. "Built by Goyette and leased to Paramount for the filming. It’s the one that jumps over the camera, and is used in almost every shot. At the end of filming, Paramount returned it to Goyette, with the exhaust crushed and cracks in the body. “There was quite a bit of superficial damage, but it held up amazingly well,” he said. He rebuilt it, and sold it to a young couple in California. The husband later ran it off the road, and Goyette rebuilt the front end for him. That owner sold it in the mid-90s, and it turned up again around 2000, but hasn’t emerged since."[16]
2. "Sold to Paramount as a kit for them to assemble as their stunt car, they did such a poor job that it was basically unusable, aside from going backwards out the window of Cameron’s house. Rebuilt, it ended up at Planet Hollywood in Minneapolis, but dropped off the map along with Planet Hollywood Minneapolis."[16]
3. "Another kit, supposed to be built as a shell for the out the window scene, it was never completed at all, and disappeared after the film was completed. Goyette thinks he once heard it was eventually completed and sold off, but it could also still be in a back lot at Paramount."[16]

The "replicar" was "universally hated by the crew," said Ruck. "It didn't work right." The scene in which Ferris turns off the car to leave it with the garage attendant had to refilmed a dozen times because it wouldn't start up."