I live in LA, and usually purchase my language learning books from the local Kinokuniya bookstore. And over the years, it's come to my attention that they're usually VERY expensive.
If you have some books, or are looking for some specific books, maybe we can start a trade/buy/sell. A photo, and maybe a description of what the book is would be good, and if you have time, a comment on what makes it a good/bad book.
*if this is off-topic, I can delete it =)