How to trade in my Honda insight for a Honda CR-Z?

My mom is giving me the 2013 Honda insight(no damage ever, 42k miles) at the end of this summer for college.
However recently i layed eyes on the CR-Z in a parking lot and i was astonished, as an 18 year old its the perfect car, about as sporty as a hybrid gets.
I'm hoping i can trade my insight in at car-max for an equal or lesser model of the CRZ, but don't have large quantities of money atm.
What i'm wondering is how much the trade would cost me?
Or if there are alternative methods, like finding another person online who is looking to trade a cr-z for an insight as a clean trade? If so, are there websites for this?
(i know a CRZ is more valuable but would a clean trade be possible if i traded it for a crz with more milage?)
2013 honda insight- 18,600
2013 honda CR-z- 19,975

No chance, no dealer will do a straight up car swap unless the one you are bringing in is worth considerably more than what you want.

Forget this idea - the CRZ only looks sporty, it doesn't drive much different from the Insight and is nowhere near as useful. Keep it until you are older and you can then buy whatever you want and can afford.