According to KBB a 2010 Toyota Prius (just selected as an example) only has a price estimate differential of $3000 between 100k miles and 400k miles. Even if you bump that up to 5k for a newer car, it's still insubstantial compared to the overall depreciation on the car from its new value of ~$25k to a 8-year used value of 3-6k. That 20k extra depreciation is not recognized by individuals but is by corporate owners.