First, let me start by saying this entire thread is complete conjecture, but of course, when has that ever stopped a good idea? Facts based on verified (fully or partially) accounts on TMC: 1. Tesla is buying used Model S vehicles from owners switching up to the P85D. 2. Used inventory is being shipped to California. 3. Tesla is not offering said inventory for sale (yet). 4. New battery swap station is under construction in California (Harris Ranch). 5. Tesla is somewhat production constrained on battery cells. Guesses: 6. Some goodly percentage of used Tesla inventory contains older "A", "B" battery packs 7. If newer "D"/"E" battery packs are used to stock the battery swapping stations, this might allow customers to leave their old "A", "B" packs behind NIFTY IDEA: 8. Take used inventory Model S battery packs and put them in the swapping stations. 9. Put new "E" packs in the old used inventory and provide "from new" warranty essentially making these cars worth more than used cars elsewhere (eBay, etc. outside of Tesla) 10. PROFIT Comments welcome.