I have ran into many items now where I cannot vendor the items for any type of currency. These items in my inventory have the "crowns" icon. Which I think they should sell for a certian value of crowns. I have no way to vendor these items because there is no value in crowns or in gold. It would be nice to find a way to utilize an added system where if we obtain items that can sell for crowns to be able to do so, or at least sell the items for an increased in gold value.
You can't sell Crowns items at the Bazaar ("No Auction"). You can sell them to regular merchants. I believe that "No Auction" housing and gardening items need to be sold to merchants who deal in those goods.
