Since this exploit will gonna fix soon i will post how to trade bind 2 handed weapons!
The first site in the Inventar must be full , 1. place put in the 2 handed bind item you want to make unbind . 2. place put in a random white item. Do a 1000k ping lag , then equip the white item with right mouse click and fast switch the 2 handed bind item over the white item . If the lag is over , the 2 handed bind item must be equiped in that window where you did put on the white item . And the White item must be on the 1. place. Now switch the white item from the 1. place in the 2. place and trade it!
enjoy!