Exclusively for its Prime members, Amazon offers the ZyXEL AV1000 Powerline Pass-Through Gigabit Ethernet Adapter 2-Pack
, model no. PLA5256KIT, for $47.96
with free shipping
. That's 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. Each adapter features data transfer rates up to 1,000Mb/s, two Gigabit Ethernet ports, a pass-through power outlet, and 128-bit encryption.