I have an opportunity to purchase a Ruger Red Label O/U All Weather stainless steel/synthetic shotgun. A family friend passed away and his widow wants to sell it. I want to give her a fair price for the gun.

It is a 26” barrel 12 gauge with removable chokes. I would say the condition is not quite NIB (there is no box), but very good.
Knowing the previous owner, I would expect that he shot 4 boxes of shells through it at most.
I have looked on Gun Broker, Guns International, several forums, and I haven’t really found much info. It seems that they are scarce because Ruger stopped making them in the early 2000s.
As best I can tell, somewhere between $1500-$2000 would be about right. For those who know about this sort of thing, does this seem correct?

I will attempt to upload pictures soon. Thanks