As one of its daily deals, 1Sale offers the ZyXEL Powerline AV 500Mbps Ethernet Adapter 2-Pack, model no. PLA4215KIT, for $39.99 with free shipping. That's $20 per adapter, $10 under our October mention, and the lowest total price we've seen. (It's a current price low by $27). These adapters plug into wall power outlets to expand your home network without running Ethernet cables through the walls. Deal ends today.