CowBoom offers the used Apple iPad Air 16GB WiFi Tablet in Space Gray, model no. MD785LL/A, for $199.99 with free shipping. That's $70 under our mention of an open-box item from a month ago and the lowest total price we've seen for any iPad Air. (It's also $188 below the best price we could find for a new unit elsewhere.)
Note: No warranty information is provided. Also, these are used items and may have scuffs, surface scratches, dents, or other cosmetic blemishes, and may be missing parts/accessories.