mwave offers the PremierTek PowerLink Hermes 300Mbps 802.11n Wireless USB Adapter with Dual 9dBi Dipole Antennas
, model no. PL-18N, for $29.99
with free shipping
. That's the lowest total price we could find by $4, although we saw it for a buck less in January. It features a max speed of 300Mbps, operating distance of up to 1.2 miles, purported 10x signal strength and 1000mW power output, dual 9dBi dipole antennas, and support for WEP, WPA2, and WPA-PSK encryption.