Clearly this is the cheapest online and legal options. It would be odd and short-lived to include illegally shared books at $0, and a site that shows physical stores would also be odd, since if you are going to a local bookshop you are probably not price sensitive.
So for someone shopping online it a good objective, and may take away business from Amazon which is probably a good thing for competition. It is also useful in helping people find books at all, sometimes Amazon doesn't have everything, especially globally.
So for someone shopping online it a good objective, and may take away business from Amazon which is probably a good thing for competition. It is also useful in helping people find books at all, sometimes Amazon doesn't have everything, especially globally.