YouBuyRite via eBay offers the refurbished Unlocked Apple iPhone 4S 16GB Worldphone for GSM Networks in Black, model no. MD234LL/A, or White, model no. MD237LL/A, for $268.88 with free shipping. That's tied with last week's mention as the lowest total price we've seen for an unlocked 16GB iPhone 4S. (It's also $79 under the best price we could find for a new one.) 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. Deal ends August 14.
Note: No warranty information is provided.