I'm trading in my Black 32gb Verizon 4S to Amazon. Why? Because they offered me $360 (I did this the 19th), which was far above any website at the time. Yes, Amazon only gives you an Amazon gift card and not cash, but if your like me, that isn't a big deal because I do a lot of my shopping on Amazon. Plus Christmas is right around the corner, so I should have no problem using all of that money.
I actually didn't know Verizon did trade ins. Do they give you cash?