CDNN & DSA have them for around $20, or at least very recently they did. I think both advertise them to be like new or in very good condition. If they are in very good condition, that is a good price. A few years ago during the ban years and before the recent Galil craze, I remember being excited if I could find a magazine for $35 here and there.
The ones Apex is selling is definitely a good price, I'm just concerned that they appear to be worn out. I have stockpiled a good supply of Galil mags now and they are all in very good condition. I would want an even better price to buy mags that have substantial finish wear and small dents. I'm sure Apex stands behind them so if you get one that doesn't work they would take it back, and you could always refinish them with GunKote. I have considered buying several and doing that but the time and money I would put into it I think I would just be better off paying a little extra for the better condition mags to start with.