A4C offers the TeleNav GPS Asset and Vehicle Tracker, model no. AT151, for $79.95 with free shipping. That's the lowest total price we could find by $10. It features customizable alerts, an SOS button, and GPS patch antenna. Deal ends March 21.
Note that this tracker requires a monthly subscription of around $29.95 a month, and a one-time activation of $19.99. Click here for more information.