Media Labs Sold me a Home Theater system that was not real Tucson Arizona

Well, it sounds like you purchased stolen property and probably to support a meth head's bad habit, as most property crime can be traced back to meth use.

Try to avoid buying things out of people's cars in parking lots, no matter how sincere they may seem.

Hopefully you won't be caught yourself for receiving stolen goods. It's likely that the serial numbers of the equipment you purchased have been registered with the police department, insurance databases, etc. There might even be an open property crime case.