Best Buy offers the Netgear Nighthawk X4S 802.11ac Wireless AC2600 Quad-Stream Router, model no. R7800-100NAS, for $199.99 with free shipping. That's tied with our mention from three weeks ago as the lowest total price we've seen. (It's the best now by $50.) It features up to 2.53Gbps data transfer speed, 128MB flash memory, 512MB RAM, Gigabit Ethernet, and two USB 3.0 ports.
Update: Amazon offers it for the same price.