Minecraft has thousands of different resources and craftable items, leading to a currently expansive and ever increasing variety of items to trade and buy/sell.
I feel personally that a JSP forum would benefit this game intensely, as currencies are already being made in game that simulate what forum gold would allow for Minecraft servers.

there is already a suggestion for this: http://forums.d2jsp.org/topic.php?t=48003051&f=258

Stick with that one, however i think there should be a forum for it

Well Minecraft is worth the forum, so ill see how this post does. Anyone can check that link if theyd like to vote there as well