Meritline offers the Geetek Janus II 802.11n Wireless USB 2.0 Adapter, model no. GT-H10DN, for $29.99. Coupon code "MLCQ31UN" cuts it to $19.99. With free shipping, that's the lowest total price we could find by $7. It features dual high-gain dipole antennas, up to 300Mbps transfer speeds, WEP, WPA, WPA2 support, and more. Coupon expires after 200 uses.