With no contract required, CowBoom offers the used Apple iPhone 4 32GB for AT&T Wireless or Verizon in Black for $289.99 with free shipping. That $50 under our November mention (for AT&T) and $319 less than the cost of a new model. Sales tax is added where applicable. It features an Apple A4 processor, 326-ppi (pixel per inch) Retina 3.5″ display running at 960×640, gyroscope, front- and rear-facing cameras, 5-megapixel camera with LED flash, 720p video capture at 30 fps, 802.11n wireless networking, dual microphones, and more.
Note that no warranty information is provided.