Just wanted to pass on an easy way to make money in the Citadel main training area. After completing the quests for each military merchant, and buying all the skills from them (cheapest there), change uniforms out of the citadel guard armor. Wait a few seconds and they will now attack you. Kill them and collect all their merchandise and experience points. COOK: "Help!! The escaped prisoners are in the kitchen!!" ...or something really cool like that.
Note: if you spy any really good items in their inventory, buy it first as what they finally drop when they die seems random. If you find that you're carrying too much stuff (weight wise), immediately teleport to the battleground and sell it, then teleport back.