Everyone,
Please don't fall for the inexpensive, no name GPS trackers. first, these are 2G or 3G devices (GSM/GPRS). At the end of this year, these networks will be fully dismantled in North America. Not to mention, adding a data-only SIM card gets really expensive ($30-40/month with most carriers w/ national coverage). If you're not getting a LTE device and special mobile (CATM) SIM card/service, you're throwing away your money.
I've been developing/marketing vehicle security and GPS tracking devices since 1999. The most cost effective route on the market today is about $100 for the device including 1 year of service and $40/year. I have 4 of them (2 E-vans and 2 daily drivers). They are locate on demand only but they also give control and alarm alerts to your smartphone.
Beyond that, a true LTE GPS tracker w/ starter kill, tracking history, bread crumbs, geo fencing, speed alerts, etc. runs about $12-20/month depending who you go with. I have 2 of these (TraxPath brand - my brand) running on my vans because I rent one to friends' bands when they tour North America.
If anyone has questions, don't hesitate to hit me up. Alarms, tracking, convenience. I can't stand theft, especially Van theft. I've know several bands to have their vans full of music equipment stolen and it's devastating to small bands who are just starting out.
Also, Viper is overpriced and over hyped. Excalibur is just about the best around. Same or better quality, way better pricing, support, and warranty.
Cheers,
Mike