On the Deep Space 9 station, Ferengi wheel and deal legal and illegal items in order to accrue the most profit. Because as you know, a Ferengi without profit is no Ferengi at all.(Rule of Acquisition #18).
3 to 8 Ferengi will buy and sell their wares, trying to monopolize a particular item for greater profit. However, once other Ferengi get those same items for sale, it becomes a matter of negotiation: do you work together to gain the same profit or do you agree to cooperate, then sell at a lower price to steal all the profit for yourself? After all, opportunity, plus instinct, equals profit (Rule of Acquisition #9).
Be wary of special action cards that can mess with the business of other Ferengi. The bigger the smile, the sharper the knife (Rule of Acquisition #48).
The Ferengi who has earned the most profit becomes the First Clerk!