My guess is the inventory data itself is real but stale. The developer was using a static dataset to build out the forthcoming "purchase cars from inventory"

My guess is the inventory data itself is real but stale. The developer was using a static dataset to build out the forthcoming "purchase cars from inventory" and it was inadvertently pushed production before it was ready. So the dataset is a mixture of actual inventory cars and cars that had been produced but simply hadn't been received by the new owners as of the snapshot.