ISO children's/young adult books

Hi there! I'm looking to stock my classroom library with books for a variety of readers! I'm looking for fiction and non-fiction, any genre, any format (graphic novels, novels, novellas, anthologies, magazines in good shape, etc.) Ages 7-18, grades 2-12, a variety of reading levels and abilities. (I teach in a spec Ed classroom.) Donations welcome, payment can be discussed!