FreedomPop offers the refurbished FreedomPop MiFi 500 Wireless Hotspot with a 4GB Data Plan 1-Month Trial and a 1-Month Premium Plus Services Trial for $39.99 with free shipping. That's $20 our mention from a week ago, the best now by $100, and the lowest total price we've seen. It features connectivity for up to 10 devices and up to a 10 hour battery life.
A 90-day FreedomPop warranty applies. Also, be sure to cancel your trials before your initial free month expires, or you'll be billed $29.98 for every additional month. Double data expires after your first six months.