Bukkit

The prices are configured in the Selltable. The format for this is the following:

1=10
3=12
35:14=50
35=15.05

This means that 1 Stone (ID=1) equals 10 Dollar and 1 Dirt (ID=3) equals 12 Dollar. Only IDs can be sold that are specified in this file!!
Also wool (id 35) is sold here.
Red wool (35:14) is sold for 50 dollars, while wool (35) is sold for 15 dollars and 5 cent. That means that EVERY kind of wool, that is not red is sold for 15.05! If you just want to sell white wool for 15.05 dollars change it to:

35:0=15.05

NOTE: It is important to list prices without Data Values (e.g. 35) BEHIND prices with Data Values (e.g. 35:14)! Else the price of the one without will also apply on them with Data Values!

After editing this file you can just type "screload" in the console and changes will apply immediately!