Per the website:
iSeeCars.com analyzed over 5.6 million sales of new model year 2017 cars between January and July of 2017, and over 700 thousand sales of used cars from the same model year between January and July of 2020
I suspect the data is faulty since COVID was in full swing for the "sales of used cars...between January and July of 2020".
Also, looking at new sales between Jan and Jul 2017 for model year 2017 wouldn't take in the higher paid prices for many of the "exotic" colors that would be custom ordered. Yet, the used sales between Jan and Jul 2020 would include those custom ordered vehicles. So that would skew the resale values also.
