Just recently bought the game, and I'm aware it's still fairly new. But the game has potential for high trading traffic. Combined elements of a tower defense and 3rd person RPG. The game has random item generation and rare drops. There is also an equivalent of open and closed online play. If you haven't heard of it I highly recommend you try it and vote! There is a f2p demo version with a decent amount of content pertaining to the game mechanics.

Bumpin'.