I can't really remember the last time I went to a bookstore shop to buy any kind of book. I don't find it realistic anymore because most of the books available in the bookstore can easily be found online, some of which are even free.For the offline mode of selling the books, you can do that through the use of bookshop. There are lot of bookshops that buys old used books from individuals so far the books and the content in it is still very much more relevant to every day use. But for the online sales of used books I don't really know much about that.