Heritage has an outstanding run of WDCS in their next auction, but I think it is a good idea for people to wonder if there are other top quality books that haven't been graded. Being an older collector, I personally know some other older collectors who are not fond of CGC because they feel it is a tool for investors rather than collectors. Accordingly, they have never submitted their books for grading.
For example, my old friend, Leonard Brown, was one of those people. When he finally asked me to sell his collection for him about 10-15 years ago, they contained many of the finest known copies when they were ultimately submitted to CGC, and he didn't have that many books. Attached is a picture of his collection sitting on my table to show Bill Ponseti, who only had to see them once to buy them with a few of his friends. The picture also includes his WDC+S #1-3, which were magnificent--#2 looks a little washed out but that is from the flash.
I mention this today because of the discussion of the status of the books in the upcoming Heritage auction. If this were 1995, for example, you would not know that these books existed. And I can assure you that there are some other very nice Disney books in particular that some older collectors have that have not been graded by CGC--in fact, I have a few myself. So when you bid on or buy any book, or any item for that matter, remember the oldest warning in the marketplace: CAVEAT EMPTOR!
Richard