You can now access the old balance during the UserBalanceUpdateEvent Event

Essentials/src/com/earth2me/essentials/User.java

@@ -444,6 +444,7 @@ public class User extends UserData implements Comparable<User>, IReplyTo, net.es
 			}
 			return;
 		}
+		final BigDecimal oldBalance = _getMoney();
 		if (Methods.hasMethod())
 		{
 			try
@@ -461,7 +462,7 @@ public class User extends UserData implements Comparable<User>, IReplyTo, net.es
 			}
 		}
 		super.setMoney(value, true);
-		ess.getServer().getPluginManager().callEvent(new UserBalanceUpdateEvent(this.getBase(), value));
+		ess.getServer().getPluginManager().callEvent(new UserBalanceUpdateEvent(this.getBase(), oldBalance, value));
 		Trade.log("Update", "Set", "API", getName(), new Trade(value, ess), null, null, null, ess);
 	}
 

Essentials/src/net/ess3/api/events/UserBalanceUpdateEvent.java

@@ -11,11 +11,13 @@ public class UserBalanceUpdateEvent extends Event
 {
 	private static final HandlerList handlers = new HandlerList();
 	private final Player player;
+	private final BigDecimal originalBalance;
 	private final BigDecimal balance;
 
-	public UserBalanceUpdateEvent(Player player, BigDecimal balance)
+	public UserBalanceUpdateEvent(Player player, BigDecimal originalBalance, BigDecimal balance)
 	{
 		this.player = player;
+		this.originalBalance = originalBalance;
 		this.balance = balance;
 	}
 
@@ -39,4 +41,9 @@ public class UserBalanceUpdateEvent extends Event
 	{
 		return balance;
 	}
+	
+	public BigDecimal getOldBalance()
+ 	{
+ 		return originalBalance;
+ 	}
 }