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seems like a sensible starting price for this:
http://www.ebay.com/itm/STEPHEN-KING-THE-SECRETARY-OF-DREAMS-VOLUME-TWO-SIGNED-LIMITED-EDITION-/281057221428?pt=Fiction&hash=item417050db34

I decided to try him out and ask what the provenance was for the book and this was the reply:

"Hi There,
This was signed with a box of books that was sent to him. I believe you are correct that...