A huge market exists in the book industry in Remainder Books. These are books that are generally slightly damaged, or more often, books that were not sold through new book channels. These books are sold through the remainder dealers. Many times these books are in perfect condition, but more times than not, they are sometimes marked with some sort of a mark (Remainder Mark) so that they cannot be returned to the publisher or distributor (as new books) for credit.
There is absolutely nothing wrong with buying and selling these books. It is just important to realize that these books cost far less that Brand New Books, therefore, in my opinion should be sold for less. We sell remainder books on Amazon. The books that you see on iDiscountBooks unless specifically noted otherwise are brand new..