After a repair, two prices exist in the market: what similar clean-history vehicles list for, and what similar vehicles with a disclosed accident list for. The spread is the practical expression of diminished value.
That spread is not the same in every segment. Mileage, rarity, and how the accident is characterized on the report all change it. A formula that ignores those facts will often miss the market.
Pull the history report yourself
See how the event is dated and described before you build a claim around an assumption. Sometimes the report says less than you expect. Sometimes it says more.
Listings are evidence if you capture them
Screenshot year, trim, mileage, asking price, location, and any history disclosure, with the date visible. A bookmark to a sold listing is not evidence.
Questions
Does higher mileage erase the loss?
Higher-mileage vehicles are already discounted, so an accident record may move the price less in dollars. A formula that sets the loss to exactly zero above a mileage threshold is a much stronger claim than that reasoning supports.