On ebay there is a factory navigation system. It says it is the display screen. Are there other parts of the system that would be needed? I'm know I would need to get a GPS antenna Currently I have the single CD player. Is it worth $300?
http://m.ebay.com/itm/2010-Mazda-5-Radio-Navigation-Display-Screen-/191828127148?nav=SEARCH
http://m.ebay.com/itm/2010-Mazda-5-Radio-Navigation-Display-Screen-/191828127148?nav=SEARCH