TigerDirect offers the TRENDnet 500Mbps Powerline AV Ethernet Adapter Kit, model no. TPL-406E2K, for $39.99 plus around $4 for shipping. That's $6 under our February mention and the lowest total price we could find now by $4. This plug-and-play Ethernet kit uses your existing electrical outlets to create a secure 500Mbps high-speed building-wide network.