Each time you want to sell or buy something, it can be difficult to find and negotiate a fair price. Today you will learn, that there are no fair prices.

When you try to buy or sell something, say how much under/over the base price do you want to pay in percent. Then roll d100+CHA*2-50 - if you roll over your stated value then you find a buyer/seller that is willing to cut a deal. If not, then you have just wasted your time. Each attempt takes [your stated value in SP if selling, or basic SP value+the amount you want to lower it by] minutes of searching. If you decide to sell for cheap or buy expensive, then if you change the value to at least 50% to your disadvantage, you automatically find a merchant.

###Cheating If you want, you can always try to trick those who trade with you. If you do so, your attempt takes up twice as usual. It gives you a +20 bonus to your d100 roll - if you still fail, however, the game is up. Local punishments may include death, amputation of the tongue, or public humiliation. Still, you probably won't trade again in this place.

(Note: all of this is completely untested, send me messages of how it went if you'll use it.)