Ending today at 4:15 pm ET, B&H Photo Video offers the Keewifi Kisslink 802.11n Wireless Router / Range Extender for $5.99 with free shipping. That's $4 under our June mention and the best per-unit deal we've seen. (It's the lowest price now by $2.) It features a signal rate of up to 300Mbps, and WPA, WPA2, WPA-PSK, and WPA-PSK2 encryption.
Making even one of these mistakes can easily cost you tens of thousands of dollars.