Appraise

Pre-release notes
According to Designer George Ziets : "Those who played NWN1 will know that the Appraise skill can be quite useful for those who deal with merchants. Your Appraise skill will be compared against the merchant's Appraise skill (and a random roll) to determine whether your reaction is favorable or unfavorable. Favorable reaction will get up to a 30% discount (exact amount partially determined by your Appraise skill), unfavorable up to 30% additional cost. Also, we check your Appraise skill in a few conversations to give you some extra dialog options."

NWN comparison

 * Appraise only affected prices when bartering. The actual value of an item was never known to a player.
 * This skill was only added with the expansion packs, not the original game.

External resources

 * NWNWiki:Appraise