Groupon offers the factory-refurbished Linksys Smart 802.11ac Wireless Dual-Band Router, model no. WRT1900AC, for $149.99. Coupon code "VISA5" cuts it to $142.49. With free shipping, that's $23 below our refurb mention from the spring and the lowest total price we've seen. (It's a current low for a refurb by $11.) This router is backwards compatible with 802.11ac networks and features a 1.2GHz dual-core processor, speeds of up to 1.3Gbps, four Gigabit Ethernet ports, Gigabit WAN port, USB 3.0 port, and LED status indicators. A 90-day Linksys warranty applies.