The Crystal Deoderant stick is the only Alum I have used since I started wetshaving. One stick has lasted me nearly two years, and it looks like I can probably get another two years (at least) out of it.
Which place(s) do you go in LA?Agree, for $2 you can get a block of natural alum from Indian grocer that will last you a lifetime. In South California, even a "spice" store has alum bin.