I have 10th edition of a bunch of texts for AP senior English class. We are moving on to 11th Edition. I have literally have over 30 of these books that I feel awful throwing in the trash. Is there an exchange somewhere where teachers in need of texts can go to network? What do you normally do with old texts? I posted them on an auction site to cover the shipment cost, but I don't know if teachers look at that auction site for things like that or not.