If you are looking to just flip it and get the max, Jet, who reads a lot of CL ads, is a pretty good judge. He has said $600.
It is a Columbus framed Celeste Bianchi from the late 80s with Campagnolo drivetrain. That narrows it down. Once you get it you can determine exactly by determining which frame material and which model derailleurs.
Even if it needs work, you certainly got a steal for $99.