No offense but why? If I am not mistaken a 2016 pre-facelift has AP1 hardware which means if it has Autopilot, it will be the old AP1 Autopilot that Tesla is not supporting anymore. So it won't get any Autopilot updates and you won't get any of the current Autopilot features.
At least get a car with AP2 hardware so that you can get the current Autopilot features.