The hardest part would be figuring out a fair loan interest rate in today’s market. But you can see dealer’s inventory on website. Easy enough to calculate tax. Maybe another $750 or so for other fees? Call and say this is the stock # of the car I want (from website), this is my out the door price, I don’t have time to come sit with salesperson. Of course, they may very well just laugh and hang up. I’m not sure what the climate is like dealing with dealers in today’s market. But it all worked perfectly for me when I did it in 2008 for my first (and only) new car purchase… Good luck and just be prepared to walk away if they become unreasonable at the very end of negotiation!