Chubbies Tech via eBay offers the Unlocked Apple iPhone 4S 16GB Worldphone for GSM Networks in White, model no. MD237LL/A, for $299.95 with free shipping. That's cents below our December mention and the lowest total price we've seen. (It's also a current low of $42.) It's compatible with GSM networks such as AT&T, T-Mobile, and Vodafone; it can't be used with CDMA networks such as Verizon or Sprint.