I'm new at this so, please take my info with a grain of salt. The rifle I bought from the Marstar M305/SKS deal looks really good to me. The finish actually looks better than I had hoped for (Considering some of the comments made about it). The rifle stock seems to have some light scratches, but other than that, looks nice.
As for the internals, I had them checked out by a Gunsmith before shooting. He checked the chamber and did a field strip of the rifle. He applied some grease to make the action smooth and told me that it was good to shoot.
I don't really know how to post pictures, but if you would like some specific areas, I could take them and post. But, I guess with all Norinco's, it's a hit and miss with quality.