I just took delivery of 14 tons of sawmill chunks from the local mill. We burn this wood for heat all winter. They sell the wood, current price is $125 for a load, 7 tons each. So that 28,000lbs of wood cost a mere $250 dollars. The wood is still fresh, I think around 40% moisture content - so that 14 tons is really 10 tons of 15% MC wood with 4 tons of water.
That 10 tons could replace 1000 gallons of gasoline, which works out to a cost of $0.25/gal.