I have used GPS Vehicle Tracking Equipment from www.vehiclerecover.com?
I have these GPS tracking units from several dozen of my business vehicles (commercial service fleet), but have gone out of that business now – can I re-sell these and if so, what is the best way to quickly sell them?
Answers below in Comments Section
~eBay would probably be your best bet, you have access to millions of potential buyers at your fingertips.
Of Interest
More