Newegg offers the Zyxel Powerline Ethernet Adapter Starter Kit, model no. PLA4211KIT, for $48.99. Coupon code "EMCPBPB62" cuts it to $39.99. With free shipping, that's the lowest total price we could find by $9. These adapters use your existing electrical outlets to create a secure high speed building-wide network. They support up to 500Mbps data transfer rates. Deal ends August 10.