Some Facts, from Stefan Jovanovich
The average costs per launch for the Space Shuttle, according to today's WSJ, were $1.5 billion; the average payload was roughly half the capacity of Delta IV rocket (23,000 kg to LEO).
SpaceX is now offering a lift package on its Falcon 9 for the same size payload at $50-$60 million (3-4% of the average cost of a shuttle launch).
Deflation has also come to the lift insurance market.