Sent my 4000nex in for service at pioneer, they want $130 to change the internal SD card. Should I have them fix it or is that something that I can do myself, seems kind of steep for a sd card. Anyway why would it go bad in the first place

You can restore your device yourself for free.

While I don't use the navi on our 8000 unit, it started to act up with the Igo spinning, then disappearing with no maps....

Everything else worked fine.

In googling, the same issue I currently had with my 8000 also happened to users of the 8200. Go figure...