$140 is too high, particularly with the stuck seatpost. The decals are ca. 1982-83. The over-BB cable routing is interesting -- my 1981 has under-BB routing. The last time I checked eBay, the going rate for a complete Bianchi of this vintage and quality was just above $300. The Celeste color helps a bit.
What is the serial number? Also, is the BB shell 70mm wide, indicating Italian origin, rather than Japanese? (It looks Italian to me, but I cannot be sure from your pictures.)
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069