I thought about ratings, and there is some simple ratings involved, such as number of failed/successful transactions with trustless escrow. The problem with ratings is they can so easily be manipulated. People will just pay for an item to themselves to give themselves a good rating. What use will ratings be then?
I was thinking therefore of leaving the ratings up to the listees in their posts. One could link to a third party trusted site that the community agrees upon in their listing post and people could view the ratings there. If anyone has an idea for a p2p style rating system that can not be abused I'm open. I could not think of anything on the initial concept for OneMarket. The entire team is always open to ideas though.
Did you happen to see my suggestion about coming up with a formula that takes multiple factors into account? I was thinking some combination of listing activity, staking balance, and the wallets days destroyed? This way you get a complete picture of how a lister is operating. It's easy to game a single matrix of activity. But if you add in others it becomes harder to game.