This is the Limiteds without 3rd row set.
This was compiled from nationwide data, both dealer and private party, from about July through Sept, 2020. I screened for only decent ones, no salvage, no accident history, no obvious problems. Some are CPO.
These are asking prices and do not take into account sales tax, dealer fees, etc.
But given the regression line, easy to see a 2015 with 60k miles for $36k is too much. Mentally adjust for what CPO is worth to you, etc.
I ended up getting a CPO 2015 with 56k for $31.5k. Below the trend line, but not the screamingest deal.
Add: to answer your Q on used vs new using such data, extend the trend line to zero miles, and shift it up by the very rough $1k per year that appears. Or figure the depreciation per year per 15k miles. Then decide if the new premium is worth it to you.