Whether you’re interested in adapting your own story, getting help, or having someone else do it for you—reading scripts will help to familiarize you with screenplay format, which can seem strange to the uninitiated. And while you can pay $10-$20 for a hard copy or for scripts “officially” published in book form, you can also find a great many scripts online—for free.
This is a list of some of the more comprehensive and frequently-updated free-script sites. If you can’t find what you’re looking for there, try the pay sources listed farther down. Between the two of them, there’s not much you can’t get hold of. Click here to see the newly updated Screenplays page.