Comp-U-Plus offers Amazon Prime members the factory-refurbished Linksys by Cisco E1000 802.11n Wireless 4-Port Broadband Router (search for "1169299" to find it) for $17.99 with free shipping. (Click "Checkout with Amazon" for the Prime benefit; otherwise, shipping adds $9.53.) That's tied with our July mention and the lowest total price we could find by $10. It features WPA and WPA2 encryption. A 90-day Cisco warranty applies.

Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months. (Note that there is currently a wait list for the Amazon Mom program.)