We have dried peppers for sale here is a list
Ghost peppers
Jay's red ghost scorpion
Primo's
Indian carbon Ghost
$26 an oz shipped. Contact me if you would like some.
Sounds about right. There are some variables, like whether the seeds were removed, what breed of pepper used (as each has a different wall and placental thickness, etc), and others, but the general rule of thumb is a pound gives you maybe one-two ounces of powder.
I think it has to do with the dinner references "supper".
It is prime growing season for many of us as we have an abundance of pods already. Fresh this time of year does better because that allows people to taste stuff they are not growing.