I would pass, as I think there are too many condition issues. Something feels off with the case too. The lugs are normally slimmer and taller.
These references pop up from time to time, one has to be patient, but once in a while one a perfect or near-perfect dial shows up.
Missing parts are really worrying, consider a service will cost you more than 300€ these days + any replacement parts.
For pricing, I think around 500€-550€ for a decently nice gold plated is around where they sell, sometimes less. The plating seems quite thin though, I have seen many been quite worn around the lugs and sides.