Winchester super x model 1 field gun 12 gauge semi-auto

Winchester super x model 1 field gun, semi-auto 12 gauge 2¾", mag capacity 4, made around 1977 in New Haven, CT, USA. Barrel length 28", ventilated rib, fixed modified choke. Brand new buffer bolt and o-ring. Previous owner refinish the stock and forend. Tiny light rust pitting at some place on the receiver.  I'm asking 800$ + shipping. No trade.