Why? Are you saying in them good ole' days price of .410 cartridges reflected their true value. Today price per box is two to three times more than 12ga.
Why should you be concerned with the prices of shotshells Jagermeister? You don't hunt, and you don't even own any double shotguns. If you actually do own any guns at all for home defense, the number of shots you'd fire should not be a cost factor even if you live in Baltimore or Chicago.
It's weird how a guy who doesn't own even one lousy double shotgun feels such a pathetic need to pretend he actually knows anything about them.