Try a Want to Buy ad here. There are several members that shoot Goex in W. GA and they might have some they'd part with. We buy it by the case and split it, much cheaper than $29.00/lb at Bass Pro.
The problem with Black Powder for a shop is that it is listed as a true explosive, so it must be in a safe (black powder storage container) and must be under lock and key.
many gun shops just don't want to mess with the extra hassle for the limited amount that thy sale.
that's one reason the modern versions are popular.
can be displayed just like regular smokeless powder.