Newegg via eBay offers the Trendnet AC1900 HD Dual Band 802.11ac Wireless Gigabit Router, model no. TEW-818DRU, for $85.99 with free shipping. That's the lowest total price we've seen and a current best by $34. It features dual-band support, four Gigabit Ethernet ports, the ability to create an isolated guest network, and both USB 3.0 and 2.0 ports.