
RULE #3 : Never spend more for an acquisition than you have to.
From: DS9: "The Maquis, Part II"
The Ferengi Rules of Acquisition were originally featured on Deep Space Nine, which aired until May 31, 1999. Only a fraction of the initial 285 Rules were ever directly referenced on the show. The books The Ferengi Rules of Acquisition and Legends of the Ferengi (both written by showrunner Ira Steven Behr), future Star Trek series, and apocrypha have added additional Rules which may not have been approved by The Ferengi Commerce Authority. There are at least 431 Rules as of 2025, some of which conflict with the original 285. I have compiled about 150 individual Rules from Mr. Behr`s books with comparisons to Memory Alpha and will include any appropriate notation where available. This is all just for fun! LLAP -erickelly