"It'll take me three days to forge you one of those."
Most towns people are simply common folk, but some have eaten enough to grow up properly, and they've managed to learn enough to be generally useful. These sorts of characters are experts.
Experts in the Game: Experts aren't playable as PCs. They lack depth, and are generally intended to only represent the various support characters that the heroes meet and interact with on their travels. They might have a name, but they can't handle themselves that well when danger is around, and they rely on the relative peace of civilization to practice their trades and crafts.
Hit Die: d6
Class Skills: Any.
Skill Points Per Level: Experts have 6 + IntMod skills at max ranks, and they do not track individual ranks.
BAB: Medium
Saves: Fortitude and Reflex Poor, Will Good
Weapon and Armor Proficiency: An expert is proficient with all simple weapons and Light armor.
NPC Array: Experts generally have the following stat array: 13, 12, 11, 10, 9, 8
Tradecraft (Ex): Experts are intended to be very easy to use. Instead of having feats, Experts have +1 to any skill check that they make for each feat that they would otherwise have. This bonus applies to both their trained skills as well as their untrained skills.
Open Mind (Ex): A 2nd level expert gains an additional trained skill.
Skilled Focus (Ex): 3rd level Experts get an extra +3 on all of their trained skills.
Very Open Mind (Ex): A 4th level expert gains another additional trained skill.
Practice Makes Perfect (Ex): 5th level Experts roll twice for all skill checks, and take the higher result.
Trading Out Expert Levels: Experts aren't actually good at much when there's danger about. If an Expert becomes an important character, they should replace their Expert levels with levels in a PC class.