Walmart offers the Virgin Mobile Overdrive Pro 3G/4G Prepaid Mobile Hotspot for $45 with free shipping. That's $27 under our October mention and the lowest total price we've seen. (It's a current price low by $27.) It can provide Internet access for up to five devices at a time and features a 1.7" LCD display, 1GB RAM, and microSD card slot.

Update: It's now available for in-store pickup only.