Well actually i did some stuff with the broker.
Bought stuff pretty cheap and sold them for like the double , its risky but can work well.
Professions like the critical bopaes work also kinda well.
The hungry spirit necklace was worth 1 gold each a while ago . Farming and selling this one was also pretty lucrarive a while ago , cant tell for now.
Actually there are plenty of things you could farm , just search for em.