NextWarehouse offers the TP-LINK 802.11n Wireless 4-Port Broadband Router, model no. TL-WR740N, for $19.92 with free shipping. (newegg charges pennies more.) That's among the best prices we've seen for this router, and the lowest total price we could find by $2. (We saw it for $7 less during Black Friday week.) It features four 10/100 ports, one antenna, WPA/WPA2 encryptions, and more.