In article , LP1330
@webtv.net says...
I would imagine that a large portion of the cost of propane is in the
costs of storing and transporting it, rather than the actual cost of the
fuel as it is produced. Figure these expenses in along with the much
more expensive storage tanks of CNG, and CNG delivered would probably be
even more expensive than propane. Larry

The retail price of propane, as is the case with any other commodity,
is determined entirely by supply and demand. The costs of
production, transportation, storage, etc. are borne by those who
touch it before you get it home.