Apple Store offers the factory-refurbished Apple AirPort Extreme 802.11ac Wireless Base Station, model no. ME918LL/A, for $129 with free shipping. That's tied with our mention of a refurb from two weeks ago and $56 under the lowest total price we could find for a new unit. It uses 802.11ac WiFi technology, which offers up to 40% faster transmissions than 802.11n. A 1-year Apple warranty applies.