I believe a large part of the inventory issue mentioned in the OP has to do with sellers dealing with other companies/dealers when they decide to get rid of their car.
Companies like carmax, Vroom, or Carvana will often pay sellers more than Tesla will for their car, and from a buyer perspective, these companies make a better effort in refurbishing issues with the car before selling them, which is something Tesla doesn’t really do anymore.
I know when I bought my used car, my search initially started exclusively with Tesla, but I quickly came to learn that there are other outlets with often more desirable inventory. Tesla’s leg up is they often have a larger inventory of more recent models.
Companies like carmax, Vroom, or Carvana will often pay sellers more than Tesla will for their car, and from a buyer perspective, these companies make a better effort in refurbishing issues with the car before selling them, which is something Tesla doesn’t really do anymore.
I know when I bought my used car, my search initially started exclusively with Tesla, but I quickly came to learn that there are other outlets with often more desirable inventory. Tesla’s leg up is they often have a larger inventory of more recent models.