They used to be $20-25 each but now are $45 or so. They’re basically as good as circle 10 magazines in my experience. I have several and they’ve always been great, the only reason I wouldn’t recommend buying them now to friends is the price is so close to circle 10 mags at this point.
If you’re looking for more affordable polymer AK magazines the PSA magazines are also fully steel reinforced and under $30.