Walmart offers the TP-Link 300Mbps 802.11n Universal Wireless Range Extender for $15.99. Opt for in-store pickup to dodge the $5.99 shipping charge. That's tied with our mention from two weeks ago and the lowest price we could find by $4. It extends the range of wireless signals and features Ethernet, 64/128/152-bit WEP, WPA-PSK / WPA2-PSK encryptions, and five indicator lights.