I stumbled onto this used bookstore in Hong Kong awhile ago. It has a wide variety of hobby magazines, lots of fiction, nonfiction, photo books of Japanese idols. It has some manga but mostly sell them as a set and they are cheap. I saw a full set of the manga Fruit Basket for HKD$320 and vol 1 to 13 of Magus of the Library for about HKD$390. It also has a large collection of books for children from picture books to Aozora bunko and its likes to kids’ encyclopedia. They are all located on lower shelves so kids can reach them easily.
The store owner is a Cantonese but according to some reviews, he can speak Japanese fluently and you can ask him for to help find specific titles or authors’ works. Be sure to check it out if you’re in Hong Kong.
古書店寫樂堂
by Meowmeow-2010