Linksys Direct via Newegg offers the refurbished Linksys N600 Pro 802.11n Wireless Dual-Band Range Extender
, model no. RE4000W, for $17.99
with free shipping
. That's $2 under our August refurb mention and the lowest total price we've seen. (It's the best deal now by $7.) It simultaneously extends ranges for 2.4GHz and 5GHz bands. Features include up to 600Mbps data rates, two Ethernet ports, and WEP, WPA, WPA2, or WPS security. Deal ends March 4.
A 90-day warranty applies, but it's unclear who backs it.