mwave offers the PremierTek PowerLink 802.11n Wireless Ultra Long Distance Indoor and Outdoor USB Adapter, model no. PL-2712N, for $32.99 with free shipping. That's the lowest total price we could find by $10, although it was a buck less last month (since expired). Claiming an operating distance of up to 2,000 meters (1.24 miles), it features a max speed of 150Mbps, 12dBi dipole antenna, and support for WEP, WPA2, and WPA-PSK encryption.