1Sale via Newegg offers the TP-LINK 802.11n Wireless N Powerline Adapter, model no. TL-WPA281, for $29.99 with free shipping. That's $30 off list and the lowest total price we could find. It features a 2dBi omni-directional antenna, a maximum data transfer rate of 300Mbps, and 128-bit WEP/WPA/WPA2/PSK/2-PSK support. Offer ends January 18.