The Comtrend PG-9172 G.hn Powerline Adapter can be purchase as a kit of two for $130 or as a single unit for $70.
The adapter takes the shape of a three-prong adapter and you can plug it easily into a wall socket.
Each adapter has three indicator lights to show its status.
The adapter has a Gigabit network port to connect to an existing network or a remote device.