There is this website that is a trading post. So if lets say you want to trade something but you don't trust the guy you can use this website.(In case you don't know there is no trading system for the game.)This website works for all platforms. If you want more details go and sign up on the site
tblbm.com , there is forums. You use the Forums to post your goods for trade. (There are rules to the trade). Thats all Good Killing people.