Newegg offers the TRENDnet 500Mbps Powerline AV Ethernet Adapter Kit, model no. TPL-406E2K, for $41.99. Coupon code "EMCPEWG223" cuts it to $29.99. With free shipping, that's the lowest total price we could find by $11, although we saw it for $6 less last month. This plug-and-play Ethernet kit uses your existing electrical outlets to create a secure 500Mbps high-speed building-wide network. Deal ends May 19.