expected unit cost of a CH-53K when built in full-rate production is $55 million to $65 million.
A manufacturer's rep recently advised (hearsay only) that the current price being charged for the V-22 is
within $2mil of the high end price above, and if the 5yr extended contract is signed the cost would go down to
within $2mil of the low end price above ($67mil/$57mil)!! The price of the two aircraft may fall within the same range, although the projected costs of programs in development have a tendency to go up exponentially in military
acquisitions.
Of course in the end it's an 'apples and oranges' comparison. The 53K is a heavy lift a/c with great lifting and high alt hover capability, whereas the V-22 is a medium lift a/c with very high speed and long range capability. I can see why the Marines would want both to carry out a wider range of missions.