Newegg offers the refurbished ASUS Dual-Band 802.11n WiFi Gigabit Ethernet 3-in-1 Access Point / Wireless Bridge / Range Extender, model no. EA-N66, for $29.99 with free shipping. That's tied with our mention from a week ago and the lowest total price we could find by $40. It features an orthogonal 3x3 antenna design.
A 90-day warranty applies, but it's unclear who backs it.