From 9to5Toys.com:

Nearly 6 months after its initial release, the iPad mini with Retina display is now available for purchase from the official Apple Refurbished Store.

As of right now only the WiFi model is available and includes the 16, 32, and 64GB capacities in silver and space gray. The 16GB model is just $339, which is a savings of 15% off the list price of $399. It features a 7.9″ 2048×536 resolution display, A7 chip with M7 motion coprocessor, and 802.11n WiFi with MIMO technology. Apple refurbished devices are generally regarded as “good-as-new” by past purchasers and come with the same 1-year warranty as their new counterparts.