If you keep an eye on the trade channel, you may find some offers from other players, for items or money, or you yourself may wish to get rid of a fine item of no use to you.

Once you have met up with another player with the intention to trade, right click on the player and click [Trade with Player.] From there, you can offer up currency or other items in the trade window. Once both you and the other player are satisfied, both players must click [Ok] and the trade will be complete!