Earthdawn - Who Really Kaers?
The adept drives a “hard bargain” when selling or buying goods by making a Haggle Test against the customer’s or merchant’s Social Defense. If successful, the price rises or falls by 5 percent of the goods’ cost in favor of the adept. Merchants or customers can make Haggle Tests to readjust the price in their favor. The adept may make a number of tests per transaction equal to his Haggle Rank. However, as soon as he fails a Haggle Test, his bargaining stops.
See Players Companion for more information.