Hey, I needed to use the GE in one of my scripts so I came up with this. It's pretty basic but allows you to buy and sell different items at different prices and amounts, as well as collect Items. Currently it's only set up to use the first box but you could easily modify to suit your needs.
GrandExchange.java:
Lemon Version:
Example Usage:
public class Script extends org.osbot.rs07.script.Script{
private final String itemName = "Blue partyhat";
private final int itemPrice = 21