Costco offers its members the D-Link AC750 802.11ac Dual Band Cloud Router in White, model no. DIR-817LW, for $47.99 with free shipping. (Non-members pay $2.40 more.) That's the lowest total price we could find by $22 and within $3 of being the cheapest 802.11ac router we've seen. It features both 2.4GHz and 5GHz bands, up to 750Mbps data transfer rate, and five Ethernet ports. Deal ends June 20.