Rule 8: Small print leads to large risk.
Rule 12: Anything worth selling is worth selling twice.
Rule 16: A deal is a deal...until a better one comes along.
Rule 23: Nothing is more important than your health, except for your money.
Rule 25: You can't make a deal if you're dead.
Rule 27: There's nothing more dangerous than an honest businessman.
Rule 33: It never hurts to suck up to the boss.[4]
Rule 34: War is good for business.[15]
Rule 35: Peace is good for business.[16]
Rule 36: Too many Ferengi can't laugh at themselves anymore.
Rule 37: You can always buy back a lost reputation.
Rule 38: Free advertising is cheap.
Rule 39: Praise is cheap. Heap it generously on all customers.
Rule 40: She can touch your lobes, but never your latinum.
Rule 41: Profit is its own reward.
Rule 42: Only negotiate when you are certain to profit.
Rule 43: Caressing an ear is often more forceful than pointing a weapon.
Rule 44: Never confuse wisdom with luck.
Rule 45: Expand or die. (reportedly this rule was given to the Ferengi by the Breen)
Rule 46: Labour camps are full of people who trusted the wrong person.
Rule 47: Don't trust a man wearing a better suit than your own.[17]
Rule 48: The bigger the smile, the sharper the knife.[18]
Rule 49: Old age and greed will always overcome youth and talent.
Rule 50: Never bluff a Klingon.
Rule 51: Never admit a mistake if there's someone else to blame.