NCIX offers its factory-refurbished Cisco Linksys High Performance Dual-Band 802.11n Wireless USB Adapter, model no. AE2500, for $4.99 with free shipping. That's $9 under our mention of a refurb from a month ago and one of the least expensive 802.11n USB wireless adapters we've seen without rebate hassles. (It's also a current price low for a refurbished unit by $11). It features WPA2 security, data transfer rates of up to 300 Mbps, and more. A Cisco warranty applies, although it's not clear for how long.