Dude go to half priced books or your local secondhand bookstore and just clean house. Classics in particular are a dime a dozen. Here's a list of "classics" to give you some ideas:

* A Hundred Years of Solitude

* Crime and Punishment

* East of Eden

* Moby Dick

* Shakespeare's collected works

* Bible, Koran, etc - keep as many sacred tomes as you can

* Plato's Republic, maybe some other philosophy classics like Thus Spoke Zarathustra

* Midnight's Children (how old does it have to be to be a classic?)

* Paradise Lost, Iliad, Odyssey

* The God of Small Things