Crazy Residual Value

a brand new Wrangler X 4x4 is around 20K.

But a 3 year old Wrangler cost 16K! So only 1.3K decrease per year? WOW, I did not believe it before
I did this research.

HOwever, I want to mention that used wranglers I found
so far all had some upgrade, but I am not sure how much
does it actually worth.

Can you give me a rough estimate on the cost of

budget lift
Body lift
DANA

Thanks