I've only ordered powder online a couple of times due to the ridiculous hazmat fees. When I do order online, I try to at least make it worth it by purchasing 8lbs or more.
I had ordered 6 pounds of RL-26 from Bruno's as it was the first I had seen in a long time - the next morning, I found a much better deal on 8# jugs from another supplier. Was able to cancel my order at Bruno's luckily and then order the 8# jug from the other supplier. All in, it was still $20 cheaper for the 8# jug with hazmat and shipping, than the 6# from Bruno's.