Tough crowd here.
I really like it. Admittedely, I'm a fan of bonded frames and this one looks very fast and compact. Those bonded lugs look great IMHO, and it still looks modern some 25 years later. The pantographing is a real bonus and looks great to and I think it adds some real value. All Campy? Great condition? Low miles? I'm no expert but $600 doesn't sound to off-the-mark to me. I've seen Vitus framed bikes go for that and more...
It never gets easier, you just go faster. ~ Greg LeMond