But if you use the guidelines for "monitoring" PCs wealth in an ongoing campaign, you have to choose whether to "forget" about already-used consumable items, or still count them in the PC's current wealth. If you forget them, you favor characters who use lots of consumables. If you still count them, you favor those who don't use any, and you may even wonder if the two characters are still balanced with each other (the wiz who spent everything on wands and now is pennyless vs the fighter who only bought permanent items are certainly NOT on par!!).