Depends what you want in an SKS. For 250$ you can get a yugo SKS from marstar. The yugo bore is not chromed which 'can' be a disadvantage when shooting corosive ammo. Since the bore is not chromed it is more important that you clean it quickly after shooting corrosive ammo, and I've heard that it takes more effort to clean a non-chromed bore. If you don't mind cleaning it well then this is not a big deal. The fit and finish is reportedly better in the yugo, more well-made I guess you could say. They also have a blade bayonet.
Norinco SKS's can be found at lever arms for 135$ and these have chromed bores. They do, however, have a shorter barrel then a regular sks and appear to be 'parts bin' sks's in that they they're smacked together out of left-over parts. Milarm carries(d?) norinco SKS's for 165$ that were more of a military style of sks in that they are full-length and have the triangle-spike type of bayonet. The wood on these is light and, for lack of a better word, sucks. The finish is likewise sucky. They work quite well, however, and if you're looking for a cheap gun to plink with or modify with an aftermarket stock then norinco option if more than fine. P&S also carries a similar SKS for 185$.