Newegg offers the TRENDnet 500Mbps Powerline AV Ethernet Adapter Kit, model no. TPL-406E2K, for $24.99 with free shipping. That's tied with our mention from two weeks ago and the lowest total price we could find by $15. This plug-and-play Ethernet kit uses your existing electrical outlets to create a secure 500Mbps high-speed building-wide network.