How do you calculate the FMV of a car in the past?

[lameri]

I am finding many sites to calculate the value of a car today, but not so if I want to calculate the value of a car on a specific date in the past? If I still don't find a good way, over how many years is it fare to spread its depreciation?

Thanks!

[tagteam]

You can't look up past KBB values?

https://www.kbb.com/car-values

[lameri]

@tagteam I have surely tried but not managed to do it on that page.

All I see is current values.