I'm a second year teacher and still working on building my classroom library. I have hit up Goodwill multiple times since I started teaching. I find a lot of great chapter books, but have a hard time finding good quality picture books that my kids will read. I'm at the point where I want specific books. Where is the best place to buy, perhaps a lot of books by a certain author? The best price I've found is to buy the books in lots on ebay for what works out to about $2.50 a book. Can I find a better price anywhere else?