Looks like Jeff Bartlett has plenty of the faster burn rate powder available. WC-844 is loaded using H-335 data, @ $100.00/8 pounds puts it at $12.50 per pound. Of course, the hazmat fee's come into consideration, but you should get a lot of good powder for much less that buying it commercially.
That's IF you were to buy it at a LGS. If you ordered it from powder valley, hazmat enters into the equation again.