My delivery estimate is Dec - Feb, so I'm confident I'll get mine by then. I'm willing to pay Tesla the retail price for the car. I would not pay a scalper a dime to get the car sooner even if I had to wait a year otherwise. It would be a used car and there could be legal/registration/tax issues I would not want to mess around with.
If you had the car now, there are folks who would pay you a premium for it. By mid-2018 there will be so many of them around that you'd be lucky to sell it for $5,000 below retail if it had zero miles on it. If you have a reservation for a mid-2018 delivery estimate, and you don't want the car, just cancel your reservation and get your thousand dollars back.