Can I trade in my broken iphones for cash?

So i have 4 broken iphones.
the iphone 4s and iphone 6 are cracked. Two iphone 5c 's are not cracked.
But all of them do not turn on or function at all.
could i still trade them in for some kind of money?

Added (1). if so, around how much you'd think?

I would sell them on eBay or a site I personally use called Swappa.

Yes. There are people who buy them. Search on the net.

Yea they have websites tou can do it on

Yes but broken they are worth very little. Something is better then nothing though.

Yeah, but you want receive more and you should also get LEO Privacy Guard 3.0 in order to gain utmost security when you own them.