Amazon has the Sierra Wireless Overdrive 3G/4G Mobile Hotspot on the Sprint Network for $49.99 (299.99 -250 instant savings) with a new service agreement for a limited time Shipping is Free.

Sierra Wireless Overdrive 3G/4G Mobile Hotspot creates a WiFi hotspot capable of supporting both Sprint’s WiMAX 4G wireless network (in available markets) and Sprint’s 3G network. It features a microSD slot, status LCD screen, built-in Wi-Fi GPS capability, and support for up to 5 users.