I was just looking through Profiles in History's Animation Auction catalog. Lots of items from animation, Walt Disney and Disneyland history. If I remember correctly, the only WDW related items I saw were two Mary Blair pieces of art that used to hang in Contemporary rooms. Most of the items in the catalog are Disney related, but the front of the catalog has some other items. Only in my dreams do I have the ability to purchase these types of items, but it was fun to look at them.
http://www.profilesinhistory.com/animation-auction-july-2012/registration-and-bidding
http://www.profilesinhistory.com/animation-auction-july-2012/registration-and-bidding