It varies from operator to operator but the figures quoted of $10,000 an hour for the use of 2 Spitfires seems entirely reasonable. It really all depends on how many people are involved in the operating of the aircraft, special paint schemes, type of flying, camera or airframe modifications which can attract CAA fees, etc. Best deal I ever got was for the production of a C4 programme and that was the unlimited use, including flying, of a Spitfire for the day for £1,000, that was in 2001. Sadly neither that aeroplane or the pilot are with us any longer, it was a very generous offer to say the least.