Merchants of Maztiquelon

Maztiquelon is a city built on trade, and all of it denizens learn the arts of haggling, as well as many other skills that make surviving in the huge, bustling city possible.

Prerequisites: must be from the city of Maztiquelon; trained in three of the following skills: Bluff, Insight, Intimidation, Perception, Streetwise, or Thievery;

At 3rd level: Choose two skills from the list of prerequisite skills, get a +2 cultural bonus in both skills;

At 6th level: Choose two skills from the list of prerequisite skills, get a +2 cultural bonus in both skills; learn one additional language (can't choose Abyssal or Supernal);

At 9th level: Choose two skills from the list of prerequisite skills, get a +2 cultural bonus in both skills; learn one additional language (can't choose Abyssal or Supernal); gain the Slippery Hand ability: At-Will--Martial, Weapon; Standard Action; Melee Weapon; Requirement: you must be wielding a light blade; Target: one creature; Attack: Dexterity vs AC; Hit: 1[W]+Dexterity modifier (increase to 2[W] at 21st level); Effect: you may make a Thievery check to pick pocket the target without the -10 penalty for attempting it in combat

This culture is still undeveloped for the APGS. The above rules  to 4th edition and give a pretty good idea of what the rules for the culture will be like.