Looking to buy first Tesla MS. Going to test drive on Tuesday at Tesla store. I've been leaning towards CPO or buying an inventory car they are trying to push out (e.g. the $1,000 per month saved and $1 a mile or whatever the equation is now) mainly to avoid the 1st and (maybe) 2nd year depreciation hit. Because Tesla seems to have a fair number of different options that have come in during varying years (I know there is a Wiki) but do you have any suggestions on what you think are the must have options both for resale value or that a non Tesla owner just may not know. e.g. 2013 = 2014 = Tech package, Supercharger, Glass pano roof, etc 2015 = Autopilot, Supercharger, Glass pano roof, etc I figure seats are preference (but most people prefer leather), maybe smart air suspension not worth?