go4computers via eBay offers the Unlocked Apple iPhone 4S 16GB Worldphone for GSM Networks in White for $615 with free shipping. That's $34 below our mention from two weeks ago and the lowest total price we've seen for an unlocked iPhone 4S. It's powered by the Apple A5 dual-core processor and features an 8-megapixel camera which is capable of recording 1080p video at 30 fps with image stabilization, dual-antenna system for faster downloads and improved call quality on GSM networks, AirPlay Mirroring, Siri voice-activated assistant, 8-hour battery life, and more. It's compatible with GSM networks such as AT&T, T-Mobile, Vodafone, and more; it can't be used with CDMA networks such as Verizon or Sprint.