Ending today at 10 pm ET, Certified Used Phone Outlet via eBay offers the refurbished Unlocked Apple iPhone 5s 16GB Smartphone for GSM Networks in Gold, Silver, or Space Grey for $185.99. Coupon code "CMADNESS10" drops it to $165.99. With free shipping, that's $5 below our refurb mention from last week and the lowest total price we've seen for an unlocked iPhone 5s 16GB. (It's a current best for a refurb by $25.)

No warranty if provided. However, Certified Used Phone Outlet offers a 30-day money back promise.