I have a Verizon iPhone 4 in good condition. It's black, 16GB. Protected in a case and invisible shield since day 1. I've used it since February and I just got a 4S. Before I take it to eBay or Craigslist, I'm offering it here for $300. They're getting $350+ everywhere else that I can see.
You get the phone, original box, and accessories. I never removed the headphones, cable, or charger out of the box so they are brand new, still in plastic.
It currently has an Invisible Shield on the front. You can leave it on or peel it off. The Invisible Shield kiosk in the mall near me will replace them for $5.