Alright, so you have 130+ items on your server and you do not want people to be able to use WeaponMaster do upgrade to that gear.
Here's an easy fix:
In NPCDialog.cs go to Market High Upgrade or whatever you called it in your source and below
add this
This makes it so he will not up any gear above level 130 and you can make your specialty items as a quest or what ever. This also fixes it so people don't get the wrong items if you have job specific items on your server.
EDIT: Sorry this is for 5165...
Here's an easy fix:
In NPCDialog.cs go to Market High Upgrade or whatever you called it in your source and below
Code:
if (GC.MyChar.Level >= NewLevel)
Code:
if (NewLevel != 0 && NewLevel <= 130 && PrevLevel < 135)
EDIT: Sorry this is for 5165...