I'm seeing so many people complain about this and I want to share my thoughts on the fact that GW2 does not have item trading like in a standard MMO, and perhaps get some discussion going.
Consider this: Do you “trade” IRL as well? What, did you give ANet a dozen apple pies when you bought GW2? :P
No? Everything you obtain or get rid of IRL is done through currency. When you want to buy a cheeseburger, you give somebody money. Money which you may have earned by working at, for example, JC Penny's selling clothes. Instead of trading clothes to somebody in return for a hot meal, you traded around currency, which is universally important to everybody.
Because of this, I hope a trade system never happens. Then gold is actually an important currency that everybody will use for everything. Even in WoW gold is slowly becoming a proper commodity, instead of people trading items - by this I mean that, more often than not, you're going to be offering gold for something you want. Have you ever heard of GDKP runs?
I very much look forward to player economy being controlled by REAL supply and demand.
Consider this scenario: You want the axe that your guildie has. You offer him gold for it, and it’s enough gold that he’s like “Sure, that sounds fair” and he CODs it to you in the mail.
Later that same night he decides he wants your Shield, and you COD it to him for a similar price. Or maybe instead of going to YOU for that Shield, he takes that gold to the marketplace. Or maybe a non-guilded buddy offers him a Shield for a lower cost than what you gave him for the axe. Or maybe in a dungeon with random people later, somebody links a kick-ass helmet that he offers gold for. Or maybe he doesn’t use that gold for gear at all, but ends up using it to buy cash shop currency from somebody else so that he can buy another character slot.
See what I’m getting it? Trading is a thing of the past. There’s a reason everybody does things for money IRL, and it's currently my hope that ANet does not implement a trading system. I honestly think they're doing this intentionally so that gold is actually used as a currency.