Amazon offers the TP-Link 300Mbps 802.11n Universal WiFi Range Extender Kit, model no. TL-WPA4220KIT, for $39.99 (79.99 -40 instant savings) with Free Shipping for a limited time.

The TP-Link Wi-Fi Range Extender seamlessly combined Power line and Wi-Fi in extending your existing wireless network It features Ethernet and WPA-PSK / WPA2-PSK encryptions.