Help with Sub ref 16800 is this a decent deal? Advice?

[HoustonRoo]

Hello All

Apologies if I've stuck this in the wrong area.

I'm looking at a Submariner listed locally, ref no. 16800. Owner says date of manufacture is 1982.

He's asking $4500.

I'd like your opinion on this particular watch.

My own observations:
1) in one of the photos, the crown looked like it was dented in but I can't really tell
2) the face is marked "Swiss" instead of "Swiss Made." An image search of other 16800's didn't turn up other examples marked this way.

Since I am not an expert by any means, if appreciate any help or feedback before I contact the owner. I plan to have the watch checked completely at a local shop that has a lot of Rolex experience if I decide to contact the owner.

Pics below: