No, they're supposed to pay you. The kind that charge an author to publish his book, known as subsidy or vanity publishers,.often don't even give the author everything he thinks he's paying for ("Oh, PRINTING x copies didn't mean BINDING them!"), and promoting and marketing the book, which legitimate publishers regularly do, is left to the author. Dealers and reviewers are seldom interested in books published by such companies. So keep trying until you find a company willing to pay to publish your book.