That's a really good deal on what is IMO, the best pump shotgun.
(I've never owned a Winchester Model 12, so I may not know)
My father no longer hunts (he's about to be 89), and had a Model 870 Wingmaster 20 gauge with a modified choke.
I have a nephew who has just taken a job as a Project Manager for a construction company. I insisted that he take the gun, because I thought his job might afford him the opportunity to take potential clients on Georgia quail hunts. A Wingmaster is a fantastic shotgun, period.
It may even more perfect in a situation where you want to pull a superb 50 year old shotgun out of a case and be able to talk about it belonging to your grandfather.