Amazon offers the refurbished D-Link DIR-655 Xtreme N 802.11n Wireless 4-Port Gigabit Router for $42.73 with free shipping. (TigerDirect offers it for just pennies more.) That's $5 under our November mention of a refurb and it's $18 less than the lowest total price we could find for a new, open-box unit today. Features include WEP, WPA, and WPA2 encryption.

Of note, no warranty information is provided.