Pro level bikes from 1985 with Dura-Ace, Campy, or Sun Tour Suberbe components sell for around $300 to $400 if they are in "like new" condition. Mid-line and entry level bikes from that era sell in bike shops for $150 to $250, with the more expensive ones being in mint condition.

I don't recall the "Club Fiji", but the only way it would be worth $600 would be if it weighs less than 21 pounds, is in "like new" condition", has all of the original components, pro quality wheels, and has either a Dura-Ace or Campy drivetrain.

Odds are, it is a $200 bike, at most.