Anybody know the best source to search online for new used F150 trucks? I have been using Autotrader and, Carfax. And a search of Craiglist. The difficulty I find is how to sort out trucks with my must haves such as Max Tow. Looking at used 17 and 18s. I can sorta narrow it by year and cab style and 4x4 but the details I end up having to read through a lot of trucks.