I bought one a couple of months ago, circa 1984 production. I don't have any pics.
If the gun is 98% awesome, in original condition (no aftermarket or gunsmithing "improvements"), I'd say $650-$750 would be reasonable, and I wouldn't roll my eyes if the price was even a bit higher than that. I think the early, pre-enhanced guns are preferable, but the later guns have more "features".
I got mine, in really outstanding shape, for $485, but it has non-original sights, hammer, grip safety, no box, etc. Of course, some of that non-originality includes a match bushing, and nice trigger job, so I'm not complaining.