What is the average repair cost for the D70 from Nikon? My d70's flash is not working and i see there's a loose moveable object in the optical viewfinder.
$200 - $300 depending on the type of repair. It could be a warranty job. Go to the Nikon website and look at the service bulletins for the D70. They could probably repair it for you for free even if it is no longer under warranty.