+1, this is a great system. I used to use this in a game I completely forgot the name of You seem to have addressed my only issue with the trading system, where one person swaps items after the other person confirms Aikar, come forth!
Love this idea. There should also be command /trade random. It would be like secret santa Where you keep trading one item until you get what you want.
You can always negate the offer if tou feel you are being scammed And i guess if the other already accepted the offer, no items can be added or be removed in both sides