DailySale offers the Linksys N150 802.11n Wireless Router, model no. E800, for $18 with free shipping. That's the lowest total price we could find by $3. It features speeds of up to 150Mbps , four 10/100 LAN ports, and support for IPv4 and IPv6.
Note: The countdown timer on the product page does not reflect an actual expiration time and resets daily.
Update: Specs corrected