this might be a stupid question.

but if you buy a GPS system for you car. is it something that you have to keep paying for (kind ofl like when you buy a cell phone, and you have to keep paying if you want to use it)

I want to buy a GPS for my car off Ebay and it says it doesnt come with the SD Memory Card.

I’m planning on purchasing a gps in-car system. I would like a really good one, but I don’t want to just throw ;my money away. Which system can I get the most bang for the buck?

I also need to know how to get my cars GPS unit number so I can use the program to track my car.