Carmax offer question

Got a strong offer online from carmax for our 2018 Kia Sedona. Online, I did not disclose a repaint of the sliding door due to a big scratch as result of opening the door too close to a cement pole in the garage (the options only included ‘accident’, which this was not). I plan on disclosing it when I bring it in to Carmax and expect the offer to possibly drop a bit - but by how much in your educated opinion?
Thanks in advance.

A post was merged into an existing topic: Sold one to CarMax