You can judge the usefulness of magic items.
Prerequisites: Appraise 5 ranks, Knowledge (arcana) 5 ranks, Spellcraft 12 ranks.
Benefit: When you succeed by 5 or more on a Spellcraft check to determine the school of magic of the aura surrounding a magic item (by casting detect magic), you can then spend 1 minute concentrating to also learn the properties of the item, as if you had cast identify.
You can use this skill trick once per day.
Source: Complete Scoundrel, page 87.