Thank you Pierre and David, David is right, I'm not just looking for new. Used is fine, especially if it's from a collector who has likely just built it once. Ideally, I'd like all the pieces and minifigs along with instructions and box, but I wouldn't mind if I had to look up instructions and the b...

I am interested in buying Harry Potter Lego - I would really like to get a Hogwarts Castle - but I'm interested in smaller sets too.
Thanks.