I sell Blue Cloud dust, but considering I have to have it shipped to me I'm not near as reasonable as some others on this forum. When buying dust I would recommend going with qualitymutationchinchillas.com. Her Blue Cloud is the cheapest I have found, other than buying a 50lb. bag, and not having it shipped.
I can ship 20# of blue sparkle in a flat-rate box for $25, including shipping.
Shipping is 1/2 the price, so it's about .62 cents a pound.
P.M. me if interested.