Hey Dave,
I think it would be safe to say that Classicos are rare, and to see a used one for sale is even more so. I know a number of us have been following the construction of a Classico in the factory to customer section, and this has been in progress since July of 2006. Alembic has been reworking some of the features, and I expect the wait time will reduce after these are finished (but I have no real information, just my own speculation). So, if you consider that they are scarce as hen's teeth, and the wait time is not insignificant, I would say that they would fetch a pretty high price, IF the right buyer is interested. I think they are beautiful, and will definitely own one (as soon as I hit the lottery).