As one of its daily deals, Amazon offers Prime members the Trendnet 500Mb/s Powerline AV Ethernet Adapter Kit, model no. TPL-406E2K, for $19.99 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $8.45.) That's $5 under our mention from last month and the best outright price we've seen. (It's also a current low by $19.). This plug-and-play Ethernet kit uses your existing electrical outlets to create a secure 500Mbps high-speed, building-wide network. Deal ends today.