One thing to point out is, consumers haven’t gained so much from the secondhand market; GameStop quite often took a lot of the value of the turn-in copy, and even pushed 2hand games as new.

There’s hobby stores where this isn’t the case, and obviously friends can trade/sell in private. But it’s not a lot of what tended to happen.

When looking at that $40 resale, some publishers had instead suggested “Hey, how about we sell for $35 to both of you, and neither of you can resell it.” That nets the publisher more money, and means the second person pays less. Obviously, that relies on the publisher deciding that reduction. But it’s hardly the only consumer good/service whose price is controlled by its maker that way. Try reselling used bread, or used movie tickets.