TigerDirect offers the factory-refurbished Netgear Powerline AV Ethernet Adapter 2-Pack, model no. XET1001-100NA, for $19.99 with free shipping. That’s $5 under our Cyber Monday mention and the lowest total price we’ve seen. (It’s also $24 under the best price we could find for a new set.) This plug-and-play Ethernet kit uses your existing electrical outlets to create a secure 85Mps network. A 90-day Netgear warranty applies.