Owners with cars that have not/do not take part in the financing program still benefit from the personal guarantee. The personal guarantee sets the used Model S market for ALL. There essentially already is a 'limited number of vehicles' - those part of the financing program. Adding a limited time etc... only causes someone else (perhaps you again) to say that the limited time wasn't long enough, therefore not fair and therefore not a big enough show of confidence in the product, etc., etc., etc... Perhaps in the future when Tesla is making real money, the guarantee will be extended, but I'm really not sure how much further out on the limb you want Mr. Musk to go at this point; he's already hanging his butt over the ledge.