Newegg has ASUS RT-N10 IEEE 802.11b/g/n Wireless Router for $17.99 with free shipping. Best price is $31.
Router supports 3rd party firmware including DD-WRT and Tomato for additional features and capabilities.
ASUS RT-N10 802.11b/g/n Wireless Router up to 150Mbps/ 10/100 Mbps Ethernet Port x4
Security: Firewall: NAT and SPI (Stateful Packet Inspection), intrusion detection including logging Logging: Dropped packet, security event, Syslog Filtering: Port, IP packet, URL Keyword, MAC address Encryption: 64/128-bit WEP, WPA, WPA2, TKIP, AES, WPA-PSK, WPA2-PSK Authentication: MAC address Access Control WPA/WPA2: WPA2 Ports: 1 x 10/100M WAN; 4 x 10/100M LAN LEDs: Power x 1, AIR x 1, WAN x 1, LAN x 4 Wireless Data Rates: Up to 150Mbps Frequency Band: 2.4GHz – 2.5GHz Antenna: 1 x external detachable dipole antenna 1 x internal PCB antenna Channels: 11 CH (US, Canada), 13 CH (ETSI), 14 CH (Japan)