PA, that tired dog you posted from gunbroker was YOUR comparison. I'd have to see that gun rather than bad photos of it, but based on what I can see, I wouldn't pay the asking price. That is, unless I were set up to totally redo the gun myself. Paying what that one needs to make it look like the gun that started the thread would more than double the asking price. And even then, I'm not sure what you'd have. There were at least decent photos of the gun that started the thread, including some of the barrel flats which tell you a whole lot about the gun and save you the trouble of asking quite a few questions--which a dummy on the other end might or might not be able to answer.
I know where there's a very nice West German Sauer 16, basic Model 60, can probably be bought for a little under $1,000. Anyone would be WAY ahead to buy that gun compared to the 16ga from gunbroker you suggested.