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 The problem is reputation in the presence of sibyl attacks.

Seller accounts on silk road had a 100$ fee to create the account and escrow. List, discover and sell is not a problem. Problem is cheaters. 
 Good point. I don't know what the best way to do that would be but I hope that we see more work towards such a reputation system on nostr though. 

Buying something from such a market today would probably require blind trust if you don't know the person behind the npub. Could also be trust based on word of mouth or something similar. 
 What about @hodlhodl ,  @peachbitcoin o robosat and other P2P marketplaces, do they have a way to highlight reputation and avoid cheaters trying sibyl attacks? 

And if it works for trading #Bitcoin it could work for trading other stuff, as well?


https://hodlhodl.com/pages/help#reputation