What to do...
Nicodemus 38--You asked
what do you do if you want a surplus rifle
and the answer is the same as it always is when you want something: First, you study up on it so you know what you are about. Except for pure, blind, luck, that is the only way IMX, to get, nicely, what you want, without vastly overpaying for it. And even then, a little luck never hurts.
I think that is what the above posters are trying to tell you. I'm being blunt, but there is a long tradition. As Pythagoras said to the king who wanted to learn a branch of math, but wanted a quick, easy, way of learning, and skip all the boring details, "Sire, there is no royal road to geometry."
www.surplusrifle.com is a wealth of info. Go there and read and learn. There are also sites that specialize in each different milsurp, e.g.
www.sksboards.com Study up and then you will be able to answer your own question, from a well-informed basis. There just isn't a simple, quick-and-easy, universal answer--and if there were, somebody would be selling it for a profit.
Now, if you're rich, and just want to throw money at the milsurp question, then and only then go to Mitchell's Mausers, buy their presentation grade or whatever they call it, and you'll have a nice, cleaned-up, prettied-up, non-collector-grade, and very expensive milsurp. And it will shoot well. But you pay $$ for your lack of knowledge. You might just as well buy a brand-new Savage in whatever cartridge you're interested.
Sorry if that wasn't the answer for which you were hoping.