Newegg offers the refurbished Tenda Dual-Band 802.11ac Wireless Router, model no. FH1206, for $17.99. This $10 mail-in rebate drops the price to $7.99. With free shipping, that's $18 under the lowest total price we could find for a new unit. It features speeds of up to 300Mbps, two external antennas, and three LAN ports. Rebate expires April 1.
A 90-day warranty applies, but it's unclear who backs it.