Let me clarify and add to that, though - the rights are always negotiable. Read up on how J.K. Rowling got richer than the Queen of England, after selling first UK serial print rights in English (or some such) for about 20K pounds. The success of the work in the UK raised the value of it in the U.S., Canada, other countries. The translation rights, the movie rights, the product rights, the rights for subsequent books in the series...

If there's one thing publishers love even more than a work's virginity, it's the proven popularity of the author and their work, and the potential to commercially exploit it in other formats.