And again, I agree with JohnN :-)
IMO, the 605 models are particularily tricky to find in good condition. First of all, they are relatively rare (or so my caseback data show...), but then, the crisp, geometric case lines of that particular model do deteriorate quite quickly - and are practically impossible to restore (IMO), since polishing of the case inevitably leads to softening of the case lines and blurry surfaces.
Best,
Hermann