NPR's guide to the running gags from the show.
An adult entertainment video series.
4 episodes feature this joke:
Michael: (referring to a "Girls with Low Self-Esteem" tape) "Is this what you want?" Tobias: "Oh, God, no."
The video series is recommended on Amazon.
Sources: Joke data compiled by Adam Cole / NPR. Episode metadata from The TVDB via a Creative Commons Attribution 3.0 United States (CC BY 3.0 US) license.