600 EUD is a little overpriced, but not horribly so. They tend to go for ~$500-$600 US (so closer to 500 EUD). I WILL note that it is a 613 movement, which, IMO, is the nicest of the Omega hand-wind 3-hander/date movements. So if it was me, I'd be willing to overpay a little for that (the rest of the manual-wind mens-size-date movements don't have quickset).
Movement picture is a little fuzzy, so not clear how much it'll need cleaning, but always buy vintage with the expectation of "Soon".
As David said, the case is a bit polished, but not horribly so. IF it had a good timegrapher result (mostly a good amplitude) I'd be more willing to pay higher-end prices though, since that means you won't NEED a service immediately.
