Where Can I Sell My Iphone 4 Verizon 16 Gb for Top Dollar? With Case?

I have an iphone 4 for verizon and it has a screen protector and a case but it has no charger and no box. It works like new but i don't need it. I want to sell it for top dollar. Where can i do that, and which website or place is safe?

Www.southwestwireless.net they pay you how much you want for it. And they pay you by credit, check, giftcard etc… Whichevery is convient to you.