Look for a late ‘80s Bianchi Brava. Nice Tange frames and 105 for ‘87/88 but the 89 had GPX. The Limited from ‘88/89 was pretty good too a bit nicer frame and 600.
a nice Nishiki or Panasonic or the Takara Elite are likely to be flying under the radar. Frankly there were lots of great bikes from that time period and I never understood why that RB1 commanded such a high premium
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk