Expansys offers its Expansys 802.11n Wireless 4-Port Router in Silver, model no. 6225N, for $18.99 with free shipping. That's second lowest price we've seen for any new 802.11n wireless 4-port router. (It's also a current price low by $2.) It features a high-gain 3dBi detachable antenna, data transfer rate of up to 150 Mbps, WEP and WPA/WPA2 support, SPI anti-DoS firewall, and more.