I think they are all getting up there. Bersa, Springfield Armory, Walther and on are all 30 and 40 dollars. The only one I know of that is still fairly reasonable is the Glock 17 and 19 mags.
I don't have a problem paying a little or a lot extra for factory mags. I know they are going to work. And that is what I need, mags that work in my pistol.