Suntour was a Japanese bicycle component manufacturer. Many bicycle brands from this era also used Suntour's components on at least some of their bikes, even the European brands. Their higher-end stuff, as well as higher-end Centurion bikes from this era, really appeal to me. Together, they would have represented really good quality and value to the American consumer at the time.

Likewise, Sakae was another Japanese company making some of the components used by many bicycle brands. Mostly handlebars, stems, seat posts and cranks. This handlebar is slightly noteworthy in that they misspelled Randonneur.

Those Cat Eye bar plugs are just nice color matched bits to keep the handlebar tape from peeling back and to help keep you from impaling your legs (or whatever!) on the ends of the handlebars in the event of a crash.

The saddle doesn't strike me as original.

The $50 in tires doesn't actually seem too bad, but I also wonder what else the service included. I wouldn't let anyone I cared about ride on 30-35 year old tires.