How much is Silverstone - too much
Around £500 for an R44 in 2007.
If you don't like the idea of paying through the nose to help fund Bernie Ecclestone's maintenance payments to Slavica then you can land at Turweston (£20) and take a 4x4 offroad taxi or get on your Brompton or Di Blasi folding machinery.
Works for me (except last year when the wx was awful and we decided not to go).
SB
PS It is said that touts can be found outside the main gates, so don't despair if you haven't pre-booked at ticket for £90, you may be able to get in far less expensively.