just make sure you run the VIN and have Tesla confirm all the options, like in service date, which is when they start the clock on warranties. Example, my car was manufactured March 2014, but didn't get titled until March 2015, I assumed (incorrectly) that my warranty would expire in March 2018, it didn't, it was under factory warranty until March 2019 and is still under the powertrain warranty that goes until March 2023... so do your homework, most the dealers are complete idiots and have no idea about FSD, AP2, Subzero, in service date, etc.
In fact their are some great 2017 P100D's getting into the high $70K online.... so I'm keeping my eyes open for a great deal.