It just takes time.
Mine's been on PH for a while, and while it's slightly overpriced compared to similar mileage/year cars, I'd wager it's in much better condition, and as such, the right buyer is out there. I've not really had much interest at all but I've held out and someone is coming to view it next week.
It might not sell, but it might, I'm not overly fussed tbh, it's part and parcel of selling cars. You hope for a price, and eventually you'll have to lower it to a price that someone is willing to pay.