You must remember that the ones on
eBay are asking price (one of them in particular is a "rattle can finish" and seems to have been put together with various bits from a parts box - I really couldn't see that getting anywhere near what is being asked).
Your bike looks pretty genuine, although not sure about the Weinmann brakes, I understand that Dancelli of the period (mid eighties, I think) used Shimano group sets.
As I said before, very nice bike ride it. Though if you are set one selling try £250 (offers accepted)
All the best.