The pinnacle of old technic: the Space Shuttle 8480. This set is one of the highest quality old ones I ever got my hands on, and complete as complete can be. :
The AMAZING Technic Lego Space Shuttle! Set #8480 - Build and Showcase - YouTube
Space Shuttle : Set 8480-1 | BrickLink
LEGO Technic 8480 Space Shuttle – LEGEND OF LEGO TECHNIC - YouTube
LEGO 8480 Space Shuttle - Sometimes declaring your passion for LEGO to your work colleagues pays off review | Brickset