What happens to new cars that were never sold?

Where do they go? Some of them never sell at all. I know they put them into storage. How can I buy one?
Added (1). I want a 1991-94 Ford Explorer, 1992-96 Ford Bronco, 1992-96 Ford F150, or a 1998-02 Lincoln Navigator.
Added (2). Look it up. You'll see articles about it.

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