How much would a broken iphone 4 sell for?

So the screen is like really smashed on the top half, you can still see the actual screen itself and the phone works properly, but also the light on the back of the phone where the camera is, is also broken and turns on and off randomly… But if you knock it with your knuckles it turns off.
I'm selling it to a friend but don't know how much to sell it for? Any ideas?

$30-$50

Probably what that other guy said but i would go for $30 if i was desperate on selling it. I wouldn't jew the person since its been out for a while and its in pretty bad shape.

Get a quote.http://phonetroops.com/sell-your-smartphone/

not sure that this would apply to you since yours is a 4, but:
"Apple Begins Offering iPhone 5 Screen Replacements, Even As Broken Screens Become 'Cooler': Report"
http://www.huffingtonpost.com/2013/06/04/iphone-screen-replacement_n_3383963.html