If you can find a person who sells used USGI mags for $10-$15 then obviously buy them or let us know where you bought them and we can get the same deal.
However, if I need a magazine and the cheapest one I can find is $25. I can't look around forever looking for that $10 mag.
Also, the prices of magazines at a New Hampshire gun show or dealer may be selling cheaper than those in Illinois.
Since the sales of used magazines from internet companies or mail-order are final. It is sometimes unwise to pay for something you can't see or inspect and then cannot return. This may end up costing more than that $25 mag.
Believe me, I looked around for months looking for used 20 round mags. Whether it was online, dealer or show, the average price was $30. I just picked up 2 used USGI 20 rounders for $20ea. in excellent cond. and I thought I got a good deal rather than paying $12 for a piece of crap USA mag. that would jam up on me.
If there were that many used magazines floating around for such cheap prices, then why does every gun shop I go to tell me they're out of USGI 20-30 round mags. If I would find them there a dealer would charge $80-100. So when I finally find one for $20, I'm buying the f**ker.
I may be a moron in your eyes, but I'm a moron who has the magazines I want.