I know this is Canada and we have a crappy dollar these days but exchange issues aside, I have a fairly substantial stock of Kent Tungsten Matrix, along with a chunk of the original Bismuth Cartridge Co shells, for my waterfowling needs in both 16 and 12 gauge. All of it was acquired at less than $2.00 a shell. Bismuth is long gone from the market place as we all know and replacement cost of my Tungsten Matrix is now over $5 per shell.
As CZ indicated, a morning in the marsh is a much more careful affair than it used to be. LOL