My recommendation would be to buy your next truck from a actual dealer instead of rolling the dice. Don't get me wrong there are some good non OEM affiliated used truck dealers out there but few and far between. Most OEM dealers are not going to sell you something this is junk.
One other way to go about it is to ask who ever you are buying it from to loan it to your or even rent it to you for a short period of time and then have someone come in and take a look at it to make sure you are not getting junk.