RE: chinese sks
I bought a Chinese SKS back when they were about a dollar.
The accuracy is...marginal. When I shoot it, the bullet moves in a roughly horizontal direction for an unspecified distance.
But I didn't expect anything else from it, so I can't claim to be disappointed. I've heard that others are terrific, though. And maybe mine just needs to be worn in a little; I haven't shot it all that much.