Trade Money Online
Normally players cannot exchange money with other players. However, on the day that the marketplace has it's half price sale, you can buy Genprey Fangs and Ioprey Fangs from the old man in the upper-left of the screen for the same price that you can sell them for. One player can buy the fangs and trade them to a second player who can sell them. In this way you can trade money to other players.