The retailers of new books around here have been stocking used titles for some years already — a practice that B&N brought to town when it discontinued its section for software.
The locally-owned big bookstore was hideously leftist, with the reprehensible demagogue Noam Chomsky’s titles displayed here and there in different sections of the store. Now that the jackoff who was responsible for that travesty has kicked off, I shop there more regularly, but AFAIC that damaged the store’s reputation. But they’d had remainder titles for as long as they’d been in business, and had to respond to B&N’s move by putting in a section of used.
Luckily we’ve never lacked for independent used booksellers in this town and area.
Until e-book prices drop, I think there’ll still be a place for bricks-and-mortar bookstores. Maybe the big box discounters for the most popular stuff, big box bookstores and indies for the rest.