I gave up sleep today just to wait for UPS to deliver my husband's psychology textbook. This made me think how much easier buying it from a store would have been. Although the price difference is what kept me from doing that. $200 for the text book locally or $170 with Amazon Student Prime. I went with Prime and Amazon got the book here overnight. Classes start Saturday of all days.
I can't see paying a price like that for a ebook though.