Correia's spot on. Norinco M14S rifles can't be brought into the U.S..
I can only assume you're not familiar with M14 derivative rifles since you're asking about price.
You're looking at anywhere from a low (if you're very lucky) of $700 for a used Polytech or Norinco, don't buy the Norinco if you can get a Polytech, to upwards of $1,200+ for Springfield or some of the other U.S. manufactured complete guns. You might get out with the same price of a Springfield if you buy a reciever and have the gun built from parts.
If you get a used Polytech you'll want a GI bolt and bolt carrier to put in. If you're lucky ,again, you'll spend $125 for that. Now with a nice used Polytech that isn't shot out with a GI bolt you'll have $825 in to it.
Now for the Buck Rogers hardware. Figure on another $500-$800 for the swoopy stock. Add a couple more hunderd for the rail forend and your pushing $1500 - $2,200 to get gun in the picture.
Of course you could just buy it for $2800 from Fulton Armory.