I looked at the certified car website and it is certainly tempting... I know this is crazy but I am tempted to either upgrade to P85+ 2014 ...or downgrade in terms of years and go with P85+ 2013. What do you guys think ? My car has 20K miles now. What is my car worth now? Will I be paying a lot for this upgrade or downgrade (so I call it) Should I wait until Model X rolls out and there might be better cars in Tesla CPO program?