Propane costs can be crazy. Last year we were paying $4/gallon, this year it's about $2/gallon. That's a HUGE difference when filling up a 500 gallon tank multiple times throughout the year.
That's because enterprise who owns the pipeline. Shut down the pipeline because they wanted too.... Therefore driving costs to triple the price because they could! Because no one else could move the gas across the country without semi or train and the price would be just as much.
This is to clear up the Jan-March 2014 price screwing we ALL took. It was not a fun time. My family owns a propane company.