Usage Guide - Buying a plot
This command require you to have the economy feature enabled!
To buy a plot a player simply has to walk up to a sign with the first row stating '[Plot]', the second displaying the price, the third displaying the seller and the fourth displaying the size of the plot. The only thing the player has to do is to hit the sign (left-click). If the player has enough money the purchase will succeed and the money will be removed from his account and placed in the sellers.