For the reference, I used NADAguide.com to get an idea of used car values as KBB.com didn't allow me to select 1LE Performance Package (and some dealerships and Carmax tried to play dumb and offered me a trade in offer for a Base SS).
Here's what it gives me now when I plug in the numbers (6700 miles, 1LE package ..etc). It was slightly better/higher a few weeks ago when I used it as a reference. I would personally never accept anything less than $31-32k as trade in unless it's a high mileage car.
