Newegg offers the Rosewill Premium 200Mbps Powerline AV+ Pass-Through Adapter Starter Kit, model no. RPLC-200PKIT, for $24.99 with free shipping. That's $5 under our Black Friday mention (which required a rebate) and the best price we've seen. (It's a current low of $35.) These adapters plug into wall power outlets to expand your home network without running Ethernet cables through the walls. It features Ethernet and AC ports.