You have a great point. They could do anything short of forcing you to complete the transaction. Generally speaking throughout their history they have allowed people to delay cars and reject delivery and just shuffle those cars to someone else in line.This is certainly true. Not so sure that Tesla has to allow you to delay without cause, or that they have to agree with a refusal to accept delivery. In both of those cases they could cancel your order(likely refunding the order fee) and put you at the back of the line and subject to current pricing structure.