"but it does mean teachers should pay close attention to price to help rebalance the market" This misses the point. These folks aren't ignorant, and often they

"but it does mean teachers should pay close attention to price to help rebalance the market" This misses the point. These folks aren't ignorant, and often they're complicit, because the publisher uses some of the excess profits to provide services to the tutor (homework admin and (auto-)grading). I wrote about this here: https://www.encona.com/posts/college-textbook-scams https://www.encona.com/posts/college-textbook-scams