The second-hand bookshop down the road from me often has copies of the various avatar novels - I got not one but two hardback copies of _I Strahd_, for a start:-) I'm willing to buy books for people, although be warned that even though the books are second-hand, by the time you add international postage it will cost as much as a new book. It's not worth it unless you're after one that's out of print, or a specific edition (and no, I've never seen a copy of the Daw edition of _Kill the Dead_ with the to-die-for cover art). If it's in print, get it from Amazon or from the guerrilla bookshop owner known as ppint.
Only don't ask just yet because I'm about to be away for a while.