I have 21 G3 mags. 5 are new steel, 16 are alloy.
Steel are all HK, I believe
Mags will only be sold in lots of 10 or more
Price for the steels ones is $30 for 5. I paid $70 for 10 a few months back and just inspected them
Price for the alloys is $20 for 10.
Here's a representative pic of the mags: