Suggestions

[Trade] Signs for All servers.

Create another type of Sell sign that gives people the ability to trade out items with the click of a sign, for instance - the sign would read somthing like this..

[trade]
item wanted
item available for trade
(Cool down timer) <- Keeps one person from cleaning it out.

With the addition of Banknotes it could be a new way to sell items for Banknotes, while also limiting them from buying .. See more