Knowing the characteristics of a Quality Bicycle is important when seeking to purchase a nice old road bicycle. I know nothing about the bicycle presented, but it does look to be a pretty decent bike, based on what I know about good bikes.

As for the price, is it very difficult to estimate value of an old road bicycle. Determining Bicycle Vintage is not just about a bike. Things like time of year, size, location and condition, all come into play.

As for being a Bianchi, there are far more knowledgeable people on the forum, regarding Bianchi, than I.

That said, I hope I have been a help.