Marks, medallions, and/or skirmish cosmetics tradeable between players
Title pretty much says it all. Allow players to give each other armour and cosmetics bartered from a skirmish camp, or allow marks and medallions to be traded in the currency bar. I know players who constantly find themselves with a deficit of marks or medallions, and other players who have a surplus and no desire to use them. I think it would be a great perk if the cosmetics or currency itself could be traded. What would a high level player with already decent armour and cosmetics do with the fruits of raiding afterwards? Marks and medallions would probably sell for some decent gold on the AH.