Amazon offers the TP-Link AV1000 2-Port Gigabit Powerline Adapter, model no. TL-PA7020, for $49.99. Clip the coupon on the page to cut that to $39.99. With free shipping, that's tied with our July mention and the lowest total price we could find by $10. It features a data transfer rate up to 1,000Mbps and power-saving mode.

Note: It will be in stock on October 4.