I tried all my cars and the values are really high.

A 2003 Toyota Sienna with 200,000 miles isn't worth $5,500 in Good condition. I mean I wish but no. Maybe $3,000 under crazy current market environments but probably more like $2,000-2,500.

Likewise a 2006 Toyota Corolla with 180,000 miles isn't worth $7,000.

But great job OP at trying this. It's a service that's really needed.

I would suggest figuring out a way to clean up the options for the trim levels. Some are just random garbage that describe part of the car - I had one trim option that was literally "1.8L" which refers to the engine. Along with 30 other options, many of which were repeats of each other.