Wow, only about 87K miles per motor. Where I live Teslas are the "yuppie staff car", and they all look the same. Did you read about the Swedish guy who blew up his Tesla with several pounds of dynamic when he found out how much a battery replacement job cost? I really liked that story!
BTW, if you got 531K miles out of the original 2.6L I-6 how many times did you refresh the head or do a complete engine rebuild and have to replace the cam belt tensioner, water pump, and center driveshaft bearing or other significant parts you can recall?
If you outlive me maybe you should buy my 190E 2.6 from my estate. I assume you're old enough to know how to drive a "stick shift".
Duke