Beat practice for selling the old car is once you get home with the new Tesla. Not even kidding. I'm an Aug order date and have read people get VINs, lose VINs, have delivery scheduled, then don't. Complete mess for anyone that doesn't have unlimited free time/flexibility and $65k under their mattress. I had EDDs in Oct, then Nov, then over Thanksgiving, then Dec, then Jan 8-Feb 5, now Jan 12-Feb 9. I've had 4 week windows, I've had 2-3 week windows. I've entered windows. And here I am, Jan 12 - Feb 9 about to enter another.