How much are my car parts worth?

I got in an accident on Sunday and my car has been declared a total loss. I was rear ended, so the entire back end of my car is destroyed. The bumper, tail lights, trunk are all trashed and the muffler is now up against the left tire. I'm not sure about the damage underneath, however, the engine is perfect and I've recently replaced most of it. But as for the parts that are still useable, what do you think they are worth? I have a '99 Ford Contour Sport.