>>50225058
Not very, you dump the items in a "for sale" container and then get a text message when an NPC buys something.
Being able to build your own inn/bar/blacksmith/onsen/whatever and have NPCs come to visit/browse/buy/place orders/etc would be cool, especially if it's linked to a supply/demand + reputation system. But probably too far off from what noa envisions Elin to be. At least at the moment. Might be a good fit for one block mode though.