For its newsletter subscribers only, Newegg offers the On Networks 200Mbps Powerline Ethernet AV Adapter 2-Pack, model no. PL200-199NAS, for $34.99. Coupon code "EMCWVWV56" cuts it to $19.99. With free shipping, that's $10 per adapter, $10 under our summer mention, and the lowest total price we could find a pair by $18. This plug-and-play Ethernet kit uses your existing electrical outlets to create a secure 200Mbps high-speed building-wide network. Deal ends December 18.