You really only have to worry about Amazing locks in Breland, Zilargo, and Mrorar, where the capability to manufacture such locks is so common as to make them extremely cheap.  (In Mrorar and any given Kundark vault, you might also have to face DC 50 epic locks made from adamantine reinforced steel with hardness 13 and 100hp.  House Kundark often casts protection from energy (acid, sometimes sonic) on their locks to make them even more formidable.)<br/><br/>Of course, you might also want to spend a round listening at the door and/or checking the door for traps before you open it.  Standard dungeon procedure, you know.