Posted By:
Max WederPatrick
Bobby Plapinger of Ashland OR http://www.abebooks.com/home/RPLAPINGER/ and Wayne Greene of NY http://www.abebooks.com/home/14995/ are two dealers who specialize in baseball books and often buy larger collections.
I only specializing in buying them. 
Oversized books are notoriously tough to sell--only a few post-1970 oversized books have any resale value.
Max