The merchants in Derby Line who sell or deal in books are commonly known as book seller or book dealer. The dealer very well knows that the value of a book actually depends on its physical condition. If one is looking for new books, one may visit the bookstores in Derby Line or refer online sites and he will be able to find them readily. Lots of bookstores specialize typically in out-of-print, secondhand, rare and collectible books. However, the online booksellers generally include Alibris, Amazon, and Biblio. They also inspire other stores and book dealers to sell books through their websites. Obviously this is not a free service and commission is charged on the same. The book dealers in Derby Line sometimes put the rare and collectible books for sale as per the condition of the books. Maximum of the books sold by the dealers through major auction houses are quality collectible books. Economy shops generally have second-hand book sections. There are auctions organized by book dealers also for charity fund-raisers. The trade of the book seller or dealer in Derby Line involves selling books, either by retail or wholesale. In other words, booksellers are the mediators between an author and publisher, whereas the publishers are the intermediaries between the author and the book dealer.