They are paying a fair amount. In the ballpark of $5 per book.

You know, piracy online is nice and simple - but it's kind of hard to get physical media without paying what the previous owner considers "a fair amount" to part with it.

> They should pay a fair amount.

they should pay the marginal value that the next buyer would buy.

Do you also think that a person dying of thirst ought to pay the maximum price they could possibly pay for water?

Why are you assuming they aren't? The people who have those books are choosing to sell them for a price. What isn't fair?

They're paying the market price for a used book and getting the same rights out of that purchase as you or I would if we bought a used book.