If players actually took the time to look at the trade windows (YES THATS PLURAL) and looked around for the best deals, checked current prices, considered carefully what they were buying, and weren't in such a rush, there would be no issues. You can;t force a player who made money fair to give back stuff. So currently there already is a tradeback system called I give you your cash back, you give me my items back. Most players won't do it though. They honestly made that money. How would you feel if i walked upto you and not only showed but gave you 50 million dollars, then oops just teasing or no i think thats not going to happen. This system would be abused so much and so many reports that the system would be disbanded. How would you feel if you were the one who sold your addy for 40k, fair and square, and then no he's selling 30k. I say tough luck! It was made fair and square. You want to retrade back, ask, next option resell the item, next option just deal with it. In all cases infuture take the time to look at the trade windows, look around for the best deals, check current prices, consider carefully what they were buying, and don't be in a rush. I remember the first time i was scammed. I was buying rune scimitar and i got an iron. I never made that mistake again. So no i do not support this idea. I belive those who have this issue bring it upon themselves.