I'm looking for a plugin that allows players to buy and sell items from and to the server. Not like common /buy and /sell, but like, items are physically stored somewhere and you can only buy items that have been previously sold. So no spawning items, and no buying a thousand virtual diamonds just from donating or voting. Examples: /sell $60 = sells whatever you have in your hand for $60. So whenever someone wants to buy 1 dirt, it would cost you $0.94 per block because that's the average of what people have sold it for. /buy dirt 5 = buy five dirts for $4.69. /price dirt 10 = it would say ten dirts cost $9.38.