1. Once you have their money, you never give it back.
Rom, "The Nagus"

3. Don't pay more for an acquisition than you have to.
Quark, "The Maquis, Part II"

6. Never allow family to stand in the way of opportunity.
Zek, "The Nagus"

7. Keep your ears open.
Odo, "In the Hands of the Prophets"

8. Small print leads to large risk.

9. Opportunity plus instinct equals profit.
Nog, "The Storyteller"

10. Greed is eternal.
Quark, "Prophet Motive"

13. Anything worth doing is worth doing for money.

16. A deal is a deal.
Quark, "Melora"

17. A contract is a contract is a contract -- but only between Ferengi.
Rom, Quark, Brunt, and Gint, "Body Parts"

18. A Ferengi without profit is no Ferengi at all.
Jake and Nog, "Heart of Stone"

19. Satisfaction is not guaranteed.

21. Never place friendship above profit.
Quark, "Rules of Acquisition"

22. A wise man can hear profit in the wind.
Pel, "Rules of Acquisition"

23. Nothing is more important than your health... except for your money.

23R. Money can never replace dignity.
Rom, "Prophet Motive"

27. There's nothing more dangerous than an honest businessman.

31. Never make fun of a Ferengi's mother.
Quark, "The Siege"

33. It never hurts to suck up to the boss.
Quark and Pel, "Rules of Acquisition"

34. War is good for business.
Quark, "Destiny"

35. Peace is good for business.
Dax, "Destiny"

40. She can touch your lobes, but never your latinum.

41. Profit is its own reward.

44. Never confuse wisdom with luck.

45. Expand of die.

47. Don't trust a man wearing a better suit than your own.
Quark, "Rivals"

48. The bigger the smile, the sharper the knife.
Pel, "Rules of Acquisition"

52. Never ask when you can take.

57. Good customers are as rare as latinum. Treasure them.
Quark, "Armageddon Game"

58. There is no substitute for success.

59. Free advice is seldom cheap.
Quark, "Rules of Acquisition"

60. Keep your lies consistent.

62. The riskier the road, the greater the profit.
Pel, "Rules of Acquisition"

65. Win or lose, there's always Hupyrian beetle snuff.

69. Ferengi are not responsible for the stupidity of other races.

74. Knowledge equals profit

75. Home is where the heart is, but the stars are made of latinum.
Quark, "Civil Defense"

76. Every once in a while, declare peace. It confuses the hell out of your enemies.
Quark, "The Homecoming"

79. Beware of the Vulcan greed for knowledge.

82. The flimsier the product, the higher the price.

85. Never let the competition know what you're thinking.

89. Ask not what your profits can do for you, but what you can do for your profits.

94. Females and finances don't mix.
Rom, "Ferengi Love Songs"

95. Expand or die.
Kafar, "False Profits"

97. Enough ... is never enough.

98. Every man has his price.
Quark, "In the Pale Moonlight"

99. Trust is the biggest liability of all.

102. Nature decays, but latinum lasts forever.
Nog, "The Jem'Hadar"

103. Sleep can interfere .... [cut off and Pel may have made this one up]
Pel, "Rules of Acquisition"

104. Faith moves mountains ... of inventory.

106. There is no honor in poverty.

109. Dignity and an empty sack is worth the sack.
Quark, "Rivals"

111. Treat people in your debt like family: exploit them.
Quark and Sisko, "Past Tense, Part I"

112. Never have sex with the boss's sister.
Quark, "Playing God"

113. Always have sex with the boss.

117. You can't free a fish from water.

121. Everything is for sale, even friendship.

123. Even a blind man can recognize the glow of latinum.

125. You can't make a deal if you're dead.

139. Wives serve, brothers inherit.
Odo, "Necessary Evil"

141. Only fools pay retail.

144. There's nothing wrong with charity ... as long as it winds up in your pocket.

162. Even in the worst of times, someone turns a profit.

168. Whisper your way to success.

177. Know your enemies ... but do business with the always.

181. Not even dishonesty can tarnish the shine of profit.

189. Let others keep their reputation.  You keep their money.

190. Hear all; trust nothing.
Nog, "Call to Arms"

192. Never cheat a Klingon ... unless you're sure you can get away with it.

194. It's always good to know about new customers before they walk through the door.
Quark, "Whispers"

202. The justification of profit is profit.

203. New customers are like razor toothed gree worms, they can be succulent, but sometimes they bite tack.
Rom, "Little Green Men"

208. Sometimes the only thing more dangerous than the question is an answer.
Zek, "Ferengi Love Songs"

211. Employees are the rungs on the ladder to success. Don't hesitate to step on them.
Frool, "The Bar Association"

214. Never begin a business negotiation on an empty stomach.
Quark, "Maquis, Part I"

217. You can't free a fish from water.
Sisko and Quark, "Past Tense, Part I"

218. Always know what you're buying.

223. Beware the man who doesn't make time for oo-mox.

229. Latinum lasts longer than lust.
Rom, "Ferengi Love Songs"

236. You can't buy fate.

239. Never be afraid to mislabel a product.
Gint, "Body Parts"

242. More is good ... all is better.

255. A wife is a luxury ... a smart accountant a necessity.

261. A wealthy man can afford anything except a conscience.

263. Never allow doubt to tarnish your lust for latinum.
Rom, "The Bar Association"

266. When in doubt, lie.

284. Deep down, everyone's a Ferengi.

285. No good deed ever goes unpunished.
Quark, "The Collaborator"

286. When Morn leaves, it's all over.
Quark, "The House of Quark" [This rule doesn't really exist, Quark made it up.]