This guy is simply a new version of a ticket scalper. [...] contributing absolutely nothing to the economy. He's scum.
Extremely harsh words, and nonsense to boot! Ticket scalping exists because of an artificial ceiling placed on the price of the ticket. Instead you have to "pay" by either being quick (first to get the ticket) or with your time (waiting on line forever). But price is the main determinant of the distribution of goods in our economy, and if you try to mess with that, you create inefficiencies that others can profit from.
This man is doing a fair amount of work, by traveling to these stores, going through the books, bringing them home, listing them on Amazon, shipping them, etc. Contributing nothing? Does he pay sales tax on the purchase? Does he report his sales as income? We could argue that the value he adds (and why he should profit) is that he brings something which is only locally available to a global marketplace.
Much of our economy is based on this practice. Have you ever heard of paying for something in one market only to sell it in another? When national lines are crossed, we call it "importing".