I have the following list of books in hardcover already (of course!), but picked up paperback copies at a used bookstore:
'Hearts in Atlantis'
'The Girl Who Loved Tom Gordon'
'The Stand' (uncut)
'Four Past Midnight'
'The Dark Tower' books I thru IV
I just need 'Black House' 'Lisey's Story' and 'The Dark Tower' parts V-VII and my used paperback collection is complete!