I am looking at a S75D inventory car with AP but do not want to pay the extra taxes each year for the upgrades. Would Tesla limit that car down to the 60 with no AP and then let me pay cash for the upgrades? Even if they charged extra because they technically would be purchased later, I would turn out better. This would save me about $2,300 over five years in taxes. In Nebraska you pay based on the sale price and not the actual value. Am I missing anything here?