BuySpry via eBay offers the open-box Unlocked Apple iPhone 4S 64GB Smartphone in Black, model no. MC918LL/A, for $189.99 with free shipping. That's $60 under our mention of a refurb from December and the lowest total price we've seen for a 64GB model in any condition. (It's also $80 below the best deal 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.