Legally item trading is prohibited, but in fact has been made. Transactions between individuals can be a problem with the reliability of the transaction. Game item sales between individuals than through the intermediary site is due to legal vulnerable. Game operators may prohibit item trading through the terms and conditions. Because the interrupt transaction item game stable operation. The point at which conflict gamers and game operators. Reliability of trading, is time to review the policy on such items secured transactions tax. The game operators to review the legal way to providing a system for mediating in the game.