Do your homework. See similar books in bookstores and check the copyright years to make sure it is a recently printed book. The book should be about the same size and page count, and bound like your book. Be aware that if you use a book distributor, it is common for them to charge 55 percent of the retail price. Be sure to price your book to allow for this cost. If you are not using a distributor, sell your book on Amazon. They charge about 15 percent and you fulfill your book orders. However, they expect a deep discount off the retail cost, so make sure the book pricing is in line with reality. You can always put your book on sale. But raising the price after it in print, will mean purchasing a new barcode, as well as stickers to cover up the old barcode.