Magic items can be created with restrictions that lower the cost, but can they be made with multiple restrictions? Ie, both a required skill and an alignment to lower the cost by 40%? Skill, Alignment and Class lowering by 70%???
From the SRD: Once you have a final cost figure, reduce that number if either of the following conditions applies:
—Item Requires Skill to Use: Some items require a specific skill to get them to function. This factor should reduce the cost about 10%.
—Item Requires Specific Class or Alignment to Use: Even more restrictive than requiring a skill, this limitation cuts the cost by 30%.
From the SRD: Once you have a final cost figure, reduce that number if either of the following conditions applies:
—Item Requires Skill to Use: Some items require a specific skill to get them to function. This factor should reduce the cost about 10%.
—Item Requires Specific Class or Alignment to Use: Even more restrictive than requiring a skill, this limitation cuts the cost by 30%.