Yapper Wireless via eBay offers the refurbished Unlocked Apple iPhone 4S 16GB Smartphone for GSM Networks in Black or White for $149.99 with free shipping. That's tied with our refurb mention from two weeks ago and the lowest total price we could find for a refurb now by $19. 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.

Note: No warranty information is provided.