I too would like to buy that combination. Not that I need the range (I live on an island), but having the biggest possible powerwall in my car would be nice backup when a hurricane hits.
Big battery plus solar option would be great.
Honestly I don't know who buys used Teslas. They hold their value so well that doesn't make sense to buy used. Other than not wanting to wait potentially years for something like the Cybertruck to catch up to demand. Of course.