I was terse expecting others would fill in all the blanks but didn't happen. Mileage is really irrelevant. How the bike was ridden is far more important. Stunting is incredibly hard on a bike so that's an immediate area of concern and cause of price drop. Secondarily is track time. Track bikes get thrashed pretty nicely so they don't go as cheap as your average street bike.
Crashed is another reason for price drop.
Dragging knee is for the track, and dragging tail is for the lot. --Kane Friesen
When you're in a car, you're watching a movie; when you're on a bike, you're in the movie. --Robert Pirsig
Identity theft is not Fun