Newegg offers the Actiontec 500Mb/s Powerline 4-Port Hub Ethernet Adapter Kit, model no. PWR514K01, for $47.99. Coupon code "EMCENGE46" drops the price to $24.99. With free shipping, that's the lowest total price we could find by $23. This plug-and-play Ethernet kit uses your existing electrical outlets to create a secure 500Mbps high-speed, building-wide network.