I think that a skill that lowers the price of items would be a nice addition to the game. If there is a skill for this I'm not aware of it. "Great bargaining skills, and knowing the right people has helped you to get a great price even when trading with a vending machine." EDIT: I was just thinking of tacking it onto another line, but a new line would be cool too. I didn't know about Curse of the Golden Ratio, but this is a possible alternative to getting Mathemagic. If a trade line was made, additional bag space could be another skill perhaps?