Sorry, totally miss understood what you were saying. I've just gotten so sick of constantly hearing people talk about how physical media needs to die off that I see it as the default argument most people are trying to make in these sorts of topics :-/
They can't undercut you indefinitely. You're being hyperbolic. They have to pay the customers for their trade-ins/sales. At some point its just not worth it to the customer to sell. In fact, they'd be better off joining one of those swapping sites where they can swap games for games. We're talking about distribution, not…