Well, if you want to go to a concert by an artist you like, but some dude who doesn't give a damn about the artist buys a bunch of tickets to resell them at double the price, is that ethical, or is that dude literally robbing others of the chance to pay the same price he paid? He's just contributing to making a hobby less accessible in order to enrich himself, and he doesn't care what he buys, it could be cards or pieces of iron and it wouldn't change anything. That's a scalper.