I'm looking for a Porsche OEM unit with the caveat that the radio is not staying in the car long so I'm looking to buy it CHEAP. I'm planning to upgrade to the Pioneer Avic system but that's bottom of list right now as I have some expensive maintenace to attend to first (shocks, clutch). I've been checking around and those OEM units cost almost as much as some of the older Avic units. No point in spending $300-$500 on old Porsche tech.