This mod add an item based economy system.
Use command /trade <player> to trade directly to other players.
Coins are tools for trade.
Exchange Station is a place to exchange small charges.
You can make cheques with Cheque Table. Place coins and empty cheque then click checkin can make cheques. Put fulfilled cheques in the upper slot then click checkout can extract cheques.
Who place the block will be the owner and have the following GUI where you can manage it.
The others will have another gui for trade.
There's another block named System Trade Station, which provide infinite goods. You can use it to make server shops.