Newegg offers the Netgear Powerline 1-Port Essentials Edition Ethernet Network Adapter Kit, model no. XAVB5221-100PAS, for $19.99 with free shipping via the directions below. That's $5 below our August mention and the lowest total price we've seen. (It's a current best by $20.) These adapters plug into a wall power outlet to expand your home network without having to run Ethernet cables through your house and feature data transfer rates up to 500Mbps. To get this deal:

1. View the Netgear Powerline 1-Port Essentials Edition Ethernet Network Adapter Kit for $39.99
2. apply coupon code "EMCEHHF44" to drop it to $24.99
3. redeem this $5 mail-in rebate to yield a final price of $19.99

Also available is the TP-Link AV Nano Powerline Adapter Starter Kit, model no. TL-PA4010KIT, for $24.99 via coupon code "EMCEHHF48" and this $10 mail-in rebate. With free shipping, that's $5 below our September mention and the lowest total price we could find by $13. This kit also features speeds up to 500Mbps. Both rebates end April 6.