As one of its daily deals, Amazon offers the Actiontec Powerline Ethernet Adapter Kit, model no. PWR511K01, for $29.99 with free shipping. That's the lowest total price we could find by $6, although we saw it for $10 less last month. These adapters plug into wall power outlets to expand your home network without running Ethernet cables through the walls. It provides up to 500Mbps data transfer rates.