Instead of trying to comp KBB, Carvana... visit the dealer's (or sister dealer's) lot. Find a reasonable comp on their lot, assume sell it for $3k off that price and start haggling from there. It's fun to watch their excuses evaporate.
When I traded my 17 JKUS the dealer offered me $24k...
JT or a three-row vehicle? I think Sheikh Hamad bin Hamdan Al Nahyan already solved this for us:
Seriously though, we have our JT a 2015 Odyssey:
* Three kids in car seats fit either car. I did have to remove the arm rest from the JT's back doors to get them to shut
* Car seats make it...