Earlier quoted context omitted.
You’re conflating cheap with copyright violation, which is a bit disingenuous in an attempt I guess to guilt people for wanting to buy a cheap book. It’s fine to want a cheap book, want to support the publisher/author with a legit purchase, and not care about supporting a bookstore. Not everyone who likes books cares to keep alive the industry of physical books and bookstores.
What is "fine" is a values judgement. I would say that there's a continuum that goes from downloading an unapproved copy (worst) to buying the book at a local bookstore (best), and buying from Amazon instead sits somewhere in the middle. Somebody else might find the whole publishing industry gross, and decide the most moral choices are to either pirate the book or buy a secondhand copy.
the site's cheapest appear to be exactly that. not only is secondhand the cheapest legal, but also the greenest
