Trading systems in Destiny would be a great idea, you get all these people who get multiple of the same exotic, and have no use for it, if they could pass those weapons to other players who haven't had the fortune of getting that exotic, but get a multitude of another one that the original player wants, then it's equal benefits, I myself would say, just to keep it fair, that trading opens at level 30, and you can only trade exotics that are obtained from drops. Because if you could trade for an exotic bounty weapon, then no one will do the bounties anymore, also, if you always get gear for another character, so there's your opportunity to help a fellow guardian out. this is just my opinion, I would love to hear your thoughts