I use the local Sunbelt Rentals. They fill the tank to the tare (empty) weight X 2, i.e., if the tare weight on the tank is 17.5 pounds, the guy sets the scale for 35 pounds and fill until the scale balances. This fill is $12. This isn't completely full, but it's as good as anything else available around here. The exchanges are invariably higher, and, as has been pointed out, the exchange companies have reduced the contents of their tanks. AmeriGas was giving rebates based on people's complaints about only filling to 15 pounds. They stated they had done this due to the rising price of propane, to keep the cost of a fill the same. Oddly enough, now that the price of oil (and propane- we filled our bulk tank for $1.59 / gal. this year, which is way down from last yar) is down, they haven't lowered their prices. Surprise, surprise.
“Malt does more than Milton can / To justify God’s ways to man”
-A. E. Housman (1859–1936). A Shropshire Lad , 1896.