It has to be made clear that this isn't about legality. It's also not about whether this "technically qualifies" as "banning" or "censorship". It's about what kind of society we want to live in. I want to live in an open society. I want to be able to watch movies and read books that offend people. I want to be my own censor and I want everybody to be their own censor. We're grown-ups, we can make decisions like this…
Not trying to be snarky but there are I believe more than enough stores happy to sell you whatever you want, even though eBay won't allow these books to be listed. I'm confused as to how eBay banning the listing of these books materially impacts people from getting them.
It's the same reason we get angry at people for saying racist crap even though we believe in freedom of speech.