If you are not familiar with the Wishbook Multiples thread, now is the time to check it out.  All books have wishlists, posters are just trying to save a bit of money on shipping of books which were usually purchased new.

Also, when the new memberships start on 2/15, it will make sense to request multiple books from the same person, because you will only have to pay a swap fee once, no matter how many books you order from that person!