Never, in the history of mmorpgs, has the Trade channel been used properly, if at all. There's always people who would rather trade in general chat and who won't be dissuaded from doing so. They don't care if they annoy other people. I just /ignore them, silencing them forever.I am surprised there is no Trade channel.
Well really it depends how they set up the channel.
If the trade goes across the entire game, then it will be used for something else.
If it is for the zone itself, it is a better place to go than the general chat with all the gold selling spam. (turning off /yell helps a little.. but only a little).