HometownTV Plus via Amazon offers the PremierTek PowerLink 802.11n Wireless Ultra Long Distance Indoor and Outdoor USB Adapter, model no. PL-2814N, for $37.99 with free shipping. That's tied with our September mention and the lowest total price we could find by $20. Claiming an operating distance of up to 2,000 meters (1.24 miles), it features a 14dBi panel antenna and support for WEP, WPA2, WPA2 TKIP/AES, WPA2-PSK, and WPA-PSK encryption.

Update: Price has increased to $39.85.