What is my car worth? 2010 touring/sport

[Corporate666]

I am thinking of selling my car - either trading it in or maybe private party.

It is a 2010 coupe touring model with sport package. It has a 6-speed and just turned 18k miles.

It is in immaculate (and I mean that - not a single scratch anywhere on the car and no interior wear either). Never been in an accident, clean carfax, never had any bodywork. Oil changed every 5k miles with Royal Purple. Car is bone stock. I bought it in July 2011 so it still has about 9 months of factory warranty left.

What would be a fair private party selling price and a fair trade-in price?

Hate to lose the car, but I just need something I can drive in winter and have a kid coming, so a 2-seater doesn't fit the bill