Hi all, Here is my question... I have a 2013 Model S 85 (standard... no P and no D) VIN 21XXX Options include tech package and rear facing seats. Only has 11,800 miles. The car has a ton of sentimental value to me (thats a story for another post) but I'm thinking of parting with it for more oomph. I'm interested in a same year P model... with mileage in the 30K range... Don't care for any options at all... It could be totally bare bones P85. But here's the kicker, I'd just like to do an even swap when it comes to $'s Is that possible? I have no idea what my cars's value is.