I'm going to upgrade my phone in the near future and I was wondering what my most cost effective route would be to unload my current phone.
Open to suggestions here.

It's a Galaxy S4 on Verizon (CDMA) with 16gb internal storage and a 64gb external card in it. Running the latest version of Android.
Has some minor signs of wear and tear, but nothing major, just nicks and dings around the edge, no screen or camera damage.

I also have some accessories for it. Such as the Samsung conductive charging dock and backing along with a case or two. If I could include those in my sale/trade in then even better.