AltaTac via eBay offers the 4th-generation Apple iPad with Retina Display 16GB WiFi Tablet in Silver, model no. MD513LL/A or Space Gray, model no. MD510LL/A, for $329 with free shipping. That's $21 under our mention from four weeks ago and tied as the lowest total price we've seen for a new tablet. (It's also a current price low by $54.)