Newegg offers the TRENDnet 500Mbps Powerline AV Ethernet Adapter Kit, model no. TPL-406E2K, for $39.99. Coupon code "EMCPCHA52" cuts it to $24.99. With free shipping, that's $5 below our mention from a month ago and the lowest total price we could find by at least $12. This plug-and-play Ethernet kit uses your existing electrical outlets to create a secure 500Mbps high-speed building-wide network. Deal ends August 4.