A few weeks ago I had Tesla match a CarMax appraisal from my trade-in. I just spoke to the delivery people at Mt Kisco NY and they're telling me that they'll only accept my trade-in if I bring a non-expired CarMax appraisal with me (they expire after 7 days). Has anyone else had to do this? Given how slow Tesla's contracts dept is, what will they do if the new CarMax appraisal does change and the trade-in amount needs to be updated?