Over here in Europe people look carefully at the cars. A Model 3 RWD with 60 kWh battery and Ryzen processor will fetch clearly more than an only slightly older one with 55 kWh and Atom processor. The tow hook also counts on the Model 3, where it cannot be easily retrofitted.
Being entirely undamaged also makes a difference.
FSD is usually not fully rewarded. Some dealers don't move the price for it at all, though that makes no sense.
We still have the situation that Germany subsidizes BEV, while some Nordic countries ask for high import duties for new cars. So a Tesla Model 3 or Model Y that is at least half a year old and has driven at least 6,000 km ( a bit over 4,000 miles) is considered a used car and escapes the extra cost. I know, I just sold a Model 3 from Germany to Denmark for €42,000, slightly more than what I originally paid for it 10 months ago, counting in the subsidy of €6,000, and my car had already 24,000 km, approx. 15,000 miles, on it. This year's price rise also helped.
It is clear though that used Tesla prices will not stay that high forever. On the other hand, one doesn't have to make a profit from selling a used Tesla. It is already rewarding to be able to drive a new car for much less than it would cost to lease one.