The "Ironman" aka "Dave Scott" series, and the "Pro Tour" series were top quality bikes, typical of the Japanese craftsmanship of the 1970 to 1990 era. Other Centurion bikes were priced for the low to mid-range market.

Today, if you find a Centurion in "almost new" or "like new" condition, they are often selling for $150 to $250, whether they were originally sold as an entry level model, or as a top of the line model. That makes the Centurions with Dura-Ace, Ultegra, or Shimano 105 a "best buy", and the "Pro Tour" a "best buy". The lower priced models are not bargains, unless you happen to find one at Salvation Army or a Goodwill store for $50 or $75.