@clarkii: Minimum price including shipping is ~$27 U.S. if I have it shipped to the U.S. --- for a used book.
If shipped to Canada it would be $40 U.S. and 30 business days for shipping.
(That's ignoring some of the truly ridiculous prices in excess of $100)
Considering that Herzog's book is $13 new and Kageyama's book is $15 new, and given that the book is from the same publisher, I'd think that a fair price for a new book would be ~$14. Paying ~2x the price of a new book, for a used book, is in my opinion price gouging and therefore unreasonable.
(some may consider it reasonable under the laws of supply and demand due to the book being out of print (from what I can tell). I don't share that view.)
@banx: No worries, I realize that a good book deserves to be kept in one's personal library as reference material. That's a great deal you got! Thanks for the tip, will have to look into the fundraiser.