Unfortunately while our P85 was in for a minor repair I was given a loaner with tacc/autopilot, after getting our car back I find that I miss it and really want this feature. I'm VERY happy with the P85 otherwise and would like to keep it, however it seems that Tesla will not (or cannot) add it cars that didn't come with factory installed hardware. So my questions are: 1. Has anyone sold then repurchased a used MS w/similar configurations (save for autopilot)? 2. Am I pretty much stuck with waiting for a similarly configured CPO w/autopilot to come along? I would really like to know if anyone else has done this and what it cost. Thanks!