IPhone 4s stuck at lock screen 3G?

I bought a iPhone and the whole screen doesn't work. I tried resetting it and rebooting it and holding the two buttons but none of them do anything. And I live I Oregon does any one know of muck it would cost to fix it with out warranty but please give me ideas on what to do

Try plugging it into iTunes to see of iTunes detects it.
If not, google dfu or dsu mode and follow the instructions.