Amazon offers the ZyXEL 600 Mini Powerline AV Gigabit Adapter Starter Kit, model no. PLA5205KIT, for $59.99 with free shipping. That's $10 under our mention from April and the lowest total price we've seen. (It's a current low by $12.) It's backwards compatible with 500Mbps and 200Mbps Powerline adapters and plugs into wall power outlets to expand your home network without running Ethernet cables through the walls.

Of note, Newegg offers the ZyXEL AV Powerline Wall Mount Ethernet Pass-Through Adapter 2-Pack, model no. PLA5215KIT, for $86.99. Coupon code "ZTXPMJUN309" cuts it to $74.99. With free shipping, that's $5 less than our January mention and the lowest total price we could find by $12. These adapters use your existing electrical outlets to create a secure high speed building-wide network. They support up to 600Mbps data transfer rates. Coupon expires June 30.