I have an iPhone 4 that I got about a year ago. It was originally black, but changed the glass to white when i got the chance. Never had an issue with it. Comes with original box and a charger. This is an AT&T phone as well.
Prices range from $400 (16g) for beat to hell ones to $600 (32g). This phone has NO scratches on it and has a screen protector on it. This phone has also never been jail broken. Completely unmolested. (unlike dovers jailbrokedick phone)
Asking $350 negotiable
may even throw in some cases if the buyer wants them.