What if you went into Verizon or Apple. You got a demo of a new phone. You asked for a tradein on your old phone. You got the numbers, but it was too high and you walk.
What if the sales rep saw you walking and said "wait a minute, if I could get you an extra $100 on your tradein and gave you one month service for free would you buy it today?"
Yea. Car dealers are assholes. NOT.
Try that at Tesla. NOT.