I was actually thinking that too, recently. Even if most of the people that have bought cryptos are just holding them, there should be an eshop for those that want to keep their anonymity when they'll pay. I don't understand why ebay does not allow their users to accept bitcoin. (with their own responsibility)
Amazon did that, no need for eBay.
When did amazon do that? I can still see that it only accepts paypal, bank transfer and gift cards.
With crypto Ebay you could have near zero fees and have a decentralized marketplace model. I know there are things on TOR etc, but I just wouldn't trust it tbh..
Of course you shouldn't trust it. 99% of the dark web's marketplaces are scams. Guess why, because you can't catch them.