There are 3 common varieties that accept the AK mags, the Sporter, M and D. Unless the Sporter's unusual thumbhole stock was swapped with a very hard to find D or M's stock, the Sporters generally fetch less (than the D or M), like between $500-600.
I find my Sporter is uncomfortable to get a good cheek-weld for firing with its open sights whereas the D & M shoulder like the box-mag SKS's. I can't hardly believe the price these are going for nowadays
Agree those thumbhole stocks are not conducive to using the irons. I had a d back in the 90’s, believe the d’s were preban mine had a folding bayo and Monte Carlo stock, loved that gun. But my fond memories allowed me to buy a m recently with that thumbhole stock, I put a few rounds down range with the red dot that came on it and then with a standard dust cover with no optic and it was damn hard to use the irons. The thumbhole was pretty good with the scope though. Sold it for 550