Okay, this isn't as much a market as a "Hey! I've got this, you want this, let's trade!"
Basically, each person starts a topic with the item they wish to sell and the guild members can bid on it until either it's sold or the person decides against it. The transaction will have to take place via trade, and that is at one's own risk.
Either way, Rules:
+No being rude about pricing, if you think it's too high, tell them nicely!
+Don't decide to buy something and finish the bid and then back off of it... it's not nice.
+If anyone is doing something you find questionable, PM me and I'll work it out ^^