I mentioned it because
@Zer0t mentioned that he was getting a car "with a 2800 discount and 1k miles". It is "likely" a demo car, but could also be a customer return. We have seen people get bitten here by not paying attention to the fact that the registration says "used" on it.
OP, ask the person who is helping you purchase the car (the tesla sales advisor) to verify that the car will be registered as NEW. Also, when you arrive to pick it up, ask the delivery advisor again, that it would be titled as "new" and ensure that you actually look at the registration paperwork that it states new. If it doesnt, "stop, do not pass go, do not collect 200 dollars" (lol). This is not a "paperwork issue that can be corrected later".
The car has either been sold to a customer and returned (used, regardless of miles) or has not (new, regardless of miles).
Maybe you know all this, but for anyone who doesnt, its important when dealing with things like rebates. Since this rebate in NJ is such a large amount,. people there should be exceptionally careful to make sure they cross all their "T"s and dot their "i's" so to speak.