I have made 1 gold in about 10 minutes using this method. BUT, it has totally drove up the market and can't be used as frequently anymore.
Anyhow...
Go to the tradeskill quest-giver... she'll tell you to collect 15 items of X.
For me, X = tuber strands, average pelts, minerals, etc. and rewards me with 12 silver.
As soon as I get the quest, I turn around to the broker and look for people selling that item... if it's being sold for 60 coppers or less, I buy. DING... quest item found. so I buy all 15, turn around and sell back to quest-giver for 12 silver. Get another quest, buy from broker, and turn in for another 12 silver.
The only problem with this is that in the beginning the market hads TONS of cheap items... but I used this method so much that all the cheap items are usually gone (sorry guys). So, I just keep checking every 10-15 minutes to see if some idiot is selling X for less than 60 coppers.
By the way... this exploit might have been mentioned b4, but I made it up myself without any help.
