Haunted Mansion Ghost by Kevin Kidney and Jody Daily for an upcoming Disney World Haunted Mansion-themed auction. You can read more about and buy tickets to the special event here. And here's a pdf catalog listing more items that'll be available at the event. The coolest item is this light-up Haunted Mansion model by Robert Olszewski:
It's not part of the catalog, but Olszewski also created these Vader and Maleficent paper clip boxes that are (have been?) sold at Disney park stores:
*Buy Haunted Mansion collectibles at eBay.