mwave offers the PremierTek PowerLink 802.11n Wireless USB 2.0 Adapter, model no. PL-8188CUS, for $7.99 with free shipping. That's the lowest total price we could find by $12, although we saw it for a buck less January. It features a max speed of 150Mbps, support for 256-bit WEP, WPA2, and WPA-PSK encryption, and more.