Tanga offers the refurbished 4th-generation Apple iPad 16GB WiFi Tablet with Retina Display in Black, model no. MD510LL/A, bundled with an Aduro Folio Case / Stand for $179.99 with free shipping. That's a buck under our July mention (which didn't include the folio case) and the lowest total price we've seen. (It's $169 below buying a new tablet with a case elsewhere.)
A 90-day warranty applies, although it's unclear who backs it.