Currently there is no taxes if you transfer money using the trading system. But there should be taxes to keep the economy of the game in balance.
If everyone starts using the marktplace to sell things there will be more and more money each day. Which means that prices can even increase and
it will be harder for new people to buy something nice. As much as I don't like taxes we should keep them for our economy. So in my opinion the
trading system should get taxes too, atleast for transfering money.