ZyXEL PLA407 Powerline Pass-Thru Ethernet Adapter Kit (Pair) for $59.99 shipped, valid on 10/2 only.  Here is a screenshot for your reference.  This powerline based network adapter features a plug-and-play design, data transfer rate up to 200Mbps, built-in noise filter, multi-color status LED, and more.  Most places have it for about $99.