After completing my Not Machine Learning exam on Friday (not too bad, but probably not easy enough to garner me an A in the class either), I immediately rushed to the campus bookstore to get my measly handout in exchange for the $89 textbook that I used very infrequently. Unfortunately, a new edition of the book (which itself was a new edition in 2002) is coming out in July.

So the bookstore offered to take it off my hands for $0, but instead I quickly listed it on Amazon, hoping to catch some people who weren't aware that the book would be obsolete in 2 months. Sure enough I found a buyer within 3 hours. Instead of getting $0 for this useless book, I get $40. Not bad.