Errrr... Matt, when you say that you didn't even slightly suggest QP's will be worth zero in 2-3 years, your ACTUAL quote was..... " With a resale value in 2-3 years of approximately zero", etc. etc. - your exact words. -
Mileage (sadly), does matter. What I feel though us that it shouldn't matter. You could have an unloved car with 5K on the clock that's sat in a garage rusting, similarly you could have a much-loved 100K car that's had no expense spared, runs beautifully and is more newer car than older car.
I suggest that any serious buyer (not time-wasters fancying a drive in a nice fast motor but with no cash), uses their own common sense, checks the service/ spend history of the car in detail, looks at the condition, has a comprehensive inspection and makes an informed independent decision based on cost versus quality. Garage queens do not have a great reliability reputation, including on this forum. Independent thinking, lets hope it makes a comeback eh?