Cheaper Goods

You're a merchant, get this. If an admin ever decides to sell stuff, you'll get it for cheaper. There's really not much more to it than that... I mean, Charisma and Cynicality could save you a bigger buck in the long run, being able to not only make people listen to you more but stop Charisma whores from being able to tell you to give them all your wares for a haypenny.