Can i buy a used one or does it have to be new and only work on 1 vehicle?

I actually have a 2013 RDX and 2012 TL. They both take the Purple DVD Map upgrade, so it would be great if I could buy 1 and use it on both cars.

 

Going to say nope - cause you have an access code for each disc. I could be wrong however I believe someone would be selling their old discs if that was the case.

 

Each disc can only be used for 1 vehicle