A4C via eBay offers the refurbished AT&T 2Wire 802.11g Wireless Router, model no. 2701HG-B, for $14.95 with free shipping. That's the lowest total price we could find for a refurb by $30, although we saw one for $3 less in April. It features firewall, WEP encryption, four Ethernet ports, and works with 802.11b and 802.11g wireless equipment.
Note: No warranty information is provided.