Lucky you, m-3po. These books rarely get mentioned here at The Raven and are also on my want-list. An opportunity to get them slipped right through my fingers
I've managed to acquire most of them in the last year for minimal cost from Bookmooch http://bookmooch.com/
basically you send people books you don't want and have a wishlist of books you do want that you get sent from other people. All it costs is the postage of sending books out and you pretty much get 3 books for every 2 books you send out. The only downside is that its a waiting game, (patiently waiting for someone to list that book you want can take a lifetime) but when u get one it feels good!