I don't think its low mileage, rather overall condition, history and a thorough inspection prior to sale that decides the price level to pitch for when selling a GS. No idea about Gran Turismo or QPs. I have driven mine for the two years I have owned it - so put on miles. But its all relative - it will still remain a low mileage example among the pool of cars out there (unless someone has a car stored) when I come to sell - which I am not doing or considering. Low mileage cars can still harbour issues - its down to a thorough inspection to assess the real state and worth of a GS.