Find a friend or two that shoot black powder and order up some, splitting the hazmat. A friend and I just ordered 15 pounds from Grafs, came out to $18 a pound, give or take. The only shop around here that carries Goex, charges $25.50 a pound, plus 10% tax, plus gas for the 40 mile round trip.
I shoot Grafs(Schuetzen) powder, so it is about a buck cheaper per pound.