3 ms·

I believe there are often old rules from when there was no Amazon (which wasn't that long ago). Fifteen years ago if your teacher assigned a book that could not

• rahimnathwani 13y ago
  "where would two hundred students find a copy?" They would buy them from one of the 400 students who studied the same course over the previous 2 years. In the current universe, older students are stuck with textbooks they no longer need, whilst younger students are worried about buying these same textbooks lest they miss out on some required content. I bought a used copy of 'Intermediate Microeconomics (2nd edition)' from an older student when I arrived at university, for less than half the price of the newer 3rd edition, which had been published that year. The book was much cheaper then, so I saved only a few pounds, but the current 8th edition costs over 150USD. I'm not sure how the content of a first or second course in microeconomics has changed over the last 20 years, but a used copy of the 3rd edition can now be had for less than 10USD.