I think you will also find that most cars that have 100k on the clock are also out of stat warranty. A car still under warranty holds some extra value. My old HX had well over 300k on the original 202 and it was still driving and wasn't burning oil. I'd say compression would have been low but it still drove ok. My brothers old XC did 500k on the original engine and he was not one to spend money on cars. Even the diff had no whine and he never changed the diff oil.
Got a 1976 model hemi that's done over 400,000 and still going strong....
The auto has been replaced, as they aren't the best...(BW35)....Diff, still the original one, with a disc brake conversion....
I know the full history of the car...I'm owner number 3...Owner no 1 I didn't know, but owner number 2 was the wifes aunty, who told me all the history...Win win for me...