From what I have experienced in the past, the Chinese 20rd mags are sometimes hard to find and expensive. I sold 2 in the last year for $100 each. I have been using a "no-name" 30 rd duckbill mag on my regular SKS shooter lately and have no issues with it since I have had it. Only thing is it does not have the bolt hold open feature on it but is really no issue for me. If I remember correctly, it only set me back around $20 total shipped. I have a few others also but have not gotten the chance to try them for reliability yet. It seems that they are all a trial and error adventure from what I have heard.