They came in 4Qt bags and I had to buy the bundle of 12. Wholesale was $45 total. I believe the suggested retail was $6/bag. It is not big enough for my big pot Cattleyas, but it is perfect for the 4" & 6" pots.
I like it because I don't have to store bulk bags. That is one of the reasons that I had issues with ants and scale...they were getting into the bulk storage of my bark.
I liked the way it mixed with the sand and sponge rock. Now I just have to find some bigger sponge rock. BWI gave me their catalog and I bet they can get it.