Cars will do huge mileage these days, but people still get put off by that.
When I was looking for my Passat I looked at one with every possible option. It was a lovely car in great condition, but it had done 65,000 miles in 18 months. It wasn't that which put me off as such, it was the fact that by now it would have done over 100,000 miles and by the time I came to sell it even more. That would greatly reduce it's value and leave me with more money to find to change. If the car had been cheap to begin with it might not have mattered, but because of the spec the dealers were expecting a premium price.