Thats an exceptionaly difficult bike to put a price on because high quality mixte's very rarely come up for sale. My guess is anywhere from $300-600 dpending on how you plan to market it. Very high quality frame with mediocre components.
that is a beauty.
Bianchis '87 Sport SX, '90 Proto, '90 Campione del Fausto Giamondi Specialisma Italiano Mundo, '91 Boarala 'cross, '93 Project 3, '86 Volpe, '97 Ti Megatube, , '90 something Vento 603,
Others but still loved,; '80 RIGI, '80 Batavus Professional, '87 Cornelo, '09 Motobecane SOLD, '?? Jane Doe (still on the drawing board), '90ish Haro Escape
Absolutely lovely bike - though I'm guessing you will need to be patient to get the sort of money MiamiJim is talking about. This looks like an ebay 'buy it now' candidate to me, which would allow you to patiently await the right buyer.
Once you find him or her I'm guessing they'll be delighted.
Thanks for the replies. I plan on keeping it for a while & show it off. All the components are stock & I've decided to keep it original. And YES, it is a beautiful bike!