The "D" & "M" model SKS's take AK Mags. Tho not Common, there are still some to be had
The "Type 68" although looking like a SKS is not, but rather a AK / SKS Hybrid that just never worked well. The SKS bolt and gas system are not designed for, nor would work well for a Select Fire weapon.
For $100 you Stole it, if the mags are Duck Bill Junk, sell them and make part of your investment back. ~Ace~