Newegg offers the TRENDnet 500Mbps Powerline AV Ethernet Adapter Kit, model no. TPL-406E2K, for $41.99. Coupon code "EMCPAGP24" cuts it to $24.99. With free shipping, that's tied with our mention from three weeks ago and the lowest total price we could find now by $15. (TigerDirect via Amazon has it for the same price.) This plug-and-play Ethernet kit uses your existing electrical outlets to create a secure 500Mbps high-speed building-wide network. Deal ends October 6.