repairs cost anything from a few turns with a screw driver, to a few drops of CA, to a bit of expoxy, to a bit of balsa, to a few hours work, to a new wing/fuz, to a windscreen for your mates car lol
you cant put a price on a crash untill it's flying again, i know most people quote an avgerage Heli crash with little dammage is about 85 quid +
take a look at www.philsrcworld.fsnet.co.uk/mycrashes.htm to see mine