mwave offers the PremierTek PowerLink NanoN 802.11n Wireless USB 2.0 Adapter, model no. PL-U2N, for $7.99 with free shipping. That’s the lowest total price we could find by $5. It features a max speed of 150Mbps and support for 64/128-bit WEP, WPA, WPA2, WAPI, TKIP, and AES.