Sauer - disagreement is a good thing - it opens up discussion.
Target guns tend to hold value somewhat better than field guns - I am not totally sure why, but when you look at guns for sale, it tends to be that way. Even with the Citori predecessor, the Superposed, the results are also the same. Again though, the amount I was seconding was for a gun in MINT condition, not necessarily NIB, but NRA 98% or so. If the gun has seen a fair amount of use (and a target gun typically does), then I agree with you, the value would be somewhere south, more like 750.
One thing about a Citori - they have wall thickness in the barrel, so even though this might have fixed chokes now, doesn't mean it can't have choke tubes installed.
Another thing that might hurt the value is the barrel length. Years ago, 26 was the norm for skeet, now 30+ is fashionable - if it wears 26" tubes, then the price drops again more into what you were stating - in other words, more info from the OP would give him a better determination - after the info and pics, we might be exactly the same in the value department....