How much does 1 point of speed cost?

Usually $20 in Aus. Quality varies significantly, from "white and tastes like laundry powder but is good but probably cut like crazy which is why this only cost about $50 for a whole gram" to "tastes salty / speedy and is yellowish but does stuff all" to "tastes salty / speedy / is yellowish and a bit moist and WOOHOO oh sh¡t this is the 2nd time this month I'm broke nao" :)