29 March 2014 - reddit - calvinandhobbes

"Teaching With Calvin and Hobbes

"There is a copy of Teaching with Calvin and Hobbes for sale on Amazon right now for $6000. It's signed by author Linda Holmen. Is it worth that much? In 2009, a copy sold for $10,000..."

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"If you have the means to go for it... Do it, you've worked hard for your money and if this collectible makes you happy... Go for it. That being said, I've seen it anywhere between $2,000-$50,000"

https://www.reddit.com/r/calvinandhobbes/comments/21nvue/teaching_with_calvin_and_hobbes/

22 March 2014 - 1000 Words, 1000 Days

"Watterson’s legacy is a heap of books (including a textbook, Teaching With Calvin and Hobbes, which is a rare collector’s item now) and nothing more."

http://1000words1000days.com/2014/03/day-812-the-sunday-funniest/