I think so, but that might be all that's available around you. In that case, you might want to look into getting a larger tank and filling your own 5# tanks if you can't just use the larger tank directly. I know there's info on how to do that around here somewhere.
Keep looking locally for a place that'll do fills instead of exchanges. I get fills around here for $0.75/lb. + about $0.50 hazmat charge (so < $5 total). At another place in town, an exchange on the same 5# tank would be about what you're paying.