JemJem offers the refurbished Apple iPad mini 16GB WiFi Tablet with Case in Silver, model no. MD531LL/A, or Slate, model no. MD528LL/A, for $159 with free shipping. That's tied with our mention of a case-less unit from last week as the lowest price we've seen for a refurb. (It's $20 under the best deal we could find for a refurb without a case today, excluding the deal below.) A 90-day JemJem warranty applies.
A close price: TechRestoreRefurb via eBay offers it without a case for $159.98 with free shipping.