How bad is this iPhone 4 cracked?

I would be interested to know what its worth i'm not selling it

If the screen is working maybe $10. Nobody wants a iphone 4.

if you don't plan on selling it then why ask about the price.

Very little if damaged… Value goes way down. Iphone 4 was also out around 4 years ago, so the hardware is pretty old. I would sell it for whatever you can get and then upgrade or trade it in if you can (value goes down on trade in too)