How many more millions of 30 round magazines do you think there are in civilian hands since the expiration of the awb in 2004 ?

It was been 6 years since that bs expired (at least for most of the country) and I still get excited when I see ads for new 30 round mags for $8. I personally spent about $2000 on pre ban mags during the ban and I was still happy when the ban ended. I paid as much as $28 a piece for some of my 30 round mags during the ban.