secondhand bookshop; secondhand bookstore; secondhand bookseller
古本屋に本を売りに行った。
I went to a secondhand bookshop to sell some books.
古本屋を巡るのが週末の楽しみだ。
Browsing secondhand bookshops is my weekend pleasure.
店の名前が気に入って古本屋を開いた。
I liked the name and opened a secondhand bookshop.