Had factory boxes for all the new production Norincos I handled in 1990-91 (some had Styrofoam blocks cut for the rifle and all accessories, some had folded cardboard to hold things in place in the box). All the Russian ones I saw were military surplus which had been re-packaged by importers or distributors, much like other milsurps are still sold today.
The market for SKS rifles was strange. When the new production Chinese guns were still arriving, the stores around me in west central Illinois were selling them as fast as they arrived for $79 with all the goodies. I missed the weekend sale at the local Farm King when they were eligible for a $20 new gun coupon. At the same time I remember an FFL at our local rifle club out sorting, test firing and sighting in a crate of Russian rifles he bought. Had them for sale for $65, touting the Russian lineage and milled trigger groups but folks in the area were wary of buying them because they were from 1950-1960's. Why get an old, possibly beat up and abused gun when you can get a brand new one with a warranty for the same or very little more money?
Once Clinton banned the Chinese guns and ammo, interest in the SKS seemed to wane and even though the Russian guns were still coming into the country there just wasn't much change in pricing. What makes it interesting was all the worry how this rifle was crippling the US firearm industry by flooding the country with cheap guns. There were a bunch of magazine stories asking if the SKS would replace the Winchester 30-30 as "America's deer rifle."